Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ae8ace496c22ed…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 09:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a8e6c4bbda1603ad1f6f5f9fca9dac1 SHA-1: 76128c21b25136c3d05b644dab37f9033fed9886 SHA-256: c8ae8ace496c22ed675288e2f815d26072597dadd69c411de973ea6495c8ab73
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=assamese+news+paper+download+pdf, which likely serves as a lure to download further malicious content. The document body, though heavily obfuscated, contains references to downloading PDFs, aligning with the observed link farm behavior.

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.com/pify?keyword=assamese+news+paper+download+pdf In PDF document text
    • http://kajenub.castlesjewelry-gifts.com/uploads/1/3/1/4/131453133/4474474.pdfIn PDF document text
    • http://files.cantonbeachpaddleshack.com.au/uploads/1/3/1/1/131163943/zedujogikofa.pdfIn PDF document text
    • http://files.vawvtrampoline.com/uploads/1/3/0/7/130739371/kumubuzavonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/momela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/wanudusuxezonukejuduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/dilavinovanigabopat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/nifirudufebitemafirafux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/97664606423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3695/files/disozasubovabuvotazoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/navy_blue_jacket_manual_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/kumikukozafun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/minecraft_keep_inventory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/fomenovi.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5935 4928 bytes
SHA-256: 8f3238e5f706ab358781eed77559a5616f6aaaf2b8ec9805fa06d0af9fb5b1e1
font_01_sfnt_off000069d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D6 6060 bytes
SHA-256: 0a7d36eb3498b6455ddb1f01f2dbc34e4b9d8862814193d1804521b0f27d2494
font_02_sfnt_off00007d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 10076 bytes
SHA-256: a14e0be9cdae06c62240bdb309d88813bb3dc9bdd3f65a627fd31493c0e3d1cb
font_03_sfnt_off00009fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361