Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b2e3e0a910e015…

MALICIOUS

PDF

67.8 KB Created: 2020-08-15 10:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ace06c45d9b26adba4ef380c9d0ebfb SHA-1: 3c01580d9d9fa379e92bc68548406702158515f7 SHA-256: 94b2e3e0a910e01514c27420498ef5e97b099f1d55c8eeeed351fee64be7452e
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body text, though garbled, contains phrases related to 'tnpsc group 4 answer key 2017 free download pdf', suggesting a lure. The primary malicious URL identified is https://ttraff.ru/wb?keyword=tnpsc%20group%204%20answer%20key%202017%20free%20download%20pdf, which is linked to a redirector.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=tnpsc%20group%204%20answer%20key%202017%20free%20download%20pdf In PDF document text
    • http://files.myrafayeturner.com/uploads/1/3/1/8/131872054/5237166.pdfIn PDF document text
    • http://files.jpalmergolf.com/uploads/1/3/1/1/131163723/930559e3.pdfIn PDF document text
    • http://files.zithuleleschool.org/uploads/1/3/1/3/131379894/sibefoxovotedo_gopoxonagub_ziwisuji_zuzobuwozov.pdfIn PDF document text
    • http://files.earthcraftpermaculture.com/uploads/1/3/0/7/130776257/xiposofoli.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0433/0687/7080/files/57379697448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/julamul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/42957115101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/trigger_ancient_egypt_a_social_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/57299011341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/gowoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/12560246127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/41122331260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/dolezudaruluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/9078/2881/files/cataloguing_rules.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 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000b639.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB639 8936 bytes
SHA-256: 724b17c3bc5d48a725969ea374cef17360c72cb3a2fd8db5a6e782009c9325a7
font_00_sfnt_off0000a186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA186 6024 bytes
SHA-256: f3776915b5fc8ae93245097f9db2540342a26e60b774739758f85297e260156d
font_02_sfnt_off0000cf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF63 16368 bytes
SHA-256: 760b99df4a5d41726e87e5f51846dabd4844b4752504e545ea9102057e3c31e0

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