Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a25f7d0e8cafdb…

MALICIOUS

PDF

51.9 KB Created: 2020-08-06 07:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c74eb6869db5a2be3140c9b3e78b2890 SHA-1: d26733940a40ded70bcd6a08e8a758a52e74a69d SHA-256: a8a25f7d0e8cafdba72b8692123f4b0a2dac540dacbe4f6e09dd12991d2493ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains text related to 'English to tamil conversation book pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple Shopify URLs, some benign and some unknown, indicates an attempt to blend malicious links with seemingly legitimate ones.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=english+to+tamil+conversation+book+pdf In PDF document text
    • http://files.malvernehistory.org/uploads/1/3/0/7/130775490/603dbcbf8.pdfIn PDF document text
    • http://files.singingsawpress.com/uploads/1/3/0/7/130776326/pisosodira.pdfIn PDF document text
    • http://files.mikaylamac.com/uploads/1/3/1/0/131069992/nogek_fokozukunajeb.pdfIn PDF document text
    • http://files.elliemartino.com/uploads/1/3/2/6/132681488/rojuvibutol.pdfIn PDF document text
    • http://files.thebodyshop82633.com/uploads/1/3/1/8/131871704/lesetebaritogokemul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/uninstall_microsoft_teams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/tovuvibilumawurovoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/97321553459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/nikagagejepapizikefevexiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugifewelogukepebokiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/3472423411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/nursing_drug_handbook_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/2758545646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/aiou_b._ed_admission_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/63490661001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/rws_model_34.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/dujaxunaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 5580 bytes
SHA-256: f973b32cf51a01bbd76c654176f40446e5dcf4d6ef210df4c9d77739b77c8925
font_01_sfnt_off00006dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 9876 bytes
SHA-256: 914ea79bf6b97de2ebb314ca017559fc7e3bff4748c11b12e1fd026b57cc11c4
font_02_sfnt_off0000877d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877D 14172 bytes
SHA-256: 98e3357879e208726cd32bc05e916e339afa8ce39000fba1ef8e94e44d0a255a
font_03_sfnt_off0000b3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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