Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe392e09831db6a…

MALICIOUS

PDF

56.4 KB Created: 2020-07-30 15:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45284d2c3068273d6dc106a3ea607d0c SHA-1: f920ed8cfba7bbe27b9de93fa3b2738290020970 SHA-256: 5fe392e09831db6aadfb60460cb6b22fdef39f38f9d6609db0feb1c7d49b7f0f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector link to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results and drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=algebraic+expressions+worksheets+for+class+7+pdf+with+answers
    • http://files.relicredo.com/uploads/1/3/1/3/131398139/jexalemit-lipedigaxanod.pdf
    • http://files.belmulletheritageday.com/uploads/1/3/0/7/130740262/3188a96a21e7ab.pdf
    • http://files.johnandmorgana.com/uploads/1/3/0/7/130775554/saxojig-fowilexukoluvag-lelavitap-mutifubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/pukazaxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jefapagasuvejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/jesukaduleref.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/68054386464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20726054751.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/ranawopaxezam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/pupus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/74449819769.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/dopedolupapusamaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ledezoleregawotuwenam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/rideweb.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/sisevawomita.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094cd.bin
1466d8feccdef8e5c98b3514b7ac381cc1f144e26c7d34b92c757f5c46c3e20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CD 5636 bytes
font_01_sfnt_off0000a80f.bin
43d75e77468d9580dc18dae5b970821ca038cc5914c0724c57e33e37f219c68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA80F 13796 bytes

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