Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6381d562935852…

MALICIOUS

PDF

47.7 KB Created: 2020-08-11 01:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 830aaae5d9ba4c6ce415262a1b38a083 SHA-1: c016970e0b489c4f36db938d7fc975ac820e9655 SHA-256: db6381d562935852c2f94f4407eb82ccb1fa2c8895f72228b388317cda336615
234 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, indicating a link farm or spam distribution tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=articles+grammar+examples+pdf, which likely serves as a redirector to further malicious content. The document body itself is heavily obfuscated and contains numerous URLs, reinforcing the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=articles+grammar+examples+pdf In PDF document text
    • http://wuvopuke.papercranesoaps.com/uploads/1/3/2/6/132680903/zepovizuwerat.pdfIn PDF document text
    • http://files.auntiemaileshawaiiangourmetfavorites.com/uploads/1/3/0/8/130873708/xevibabizunofim_rifuvubafep_kuxelamibabam.pdfIn PDF document text
    • http://files.acherrymoon.com/uploads/1/3/1/6/131636834/budaninulimete.pdfIn PDF document text
    • http://files.coldcomfortswhistler.com/uploads/1/3/2/6/132682113/texemekon.pdfIn PDF document text
    • http://files.aliciamerrett.co.uk/uploads/1/3/1/4/131437037/limaxedomebex_meleviduniv_mofopebab_xowuxisuketub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/65242129297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/asean_free_trade_area_afta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/funabomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/soginenumimajixuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5625/7441/files/mavejilojewog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/36771342610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/oath_of_crown_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/2000_honda_odyssey_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9970/files/35068336698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/bejupinubolik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/17801005902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/bataan_nuclear_power_plant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/kontinuierliches_anforderungsmanagement.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
🗂 Part of campaign: acherrymoon.com 5 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 5532 bytes
SHA-256: ddcdee6df08b209bedc698760bde8153059a080c75861317c4f7d5c8ec8711bd
font_01_sfnt_off00008dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 10464 bytes
SHA-256: 82d44ec4e87c2687eb4613cad7aeaeaf351a84a7454a42487ec0887b8dde22b3