Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cd32cb6b16ac28…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 07:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78be136cafaf49bf1cf813ac50b28d3c SHA-1: fa985cc59a065cd0d999a66f9148680814573355 SHA-256: 70cd32cb6b16ac28546c799ab00d89eee8a1fc9bddbd66ff5d032ab6696153bc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One prominent link, "https://ttraff.ru/pify?keyword=legitimate+free+annual+credit+report+site", is identified as a malicious redirector. The document's content and structure strongly suggest it is designed to trick users into clicking these links, likely leading to further malicious content or phishing pages. The ML classifier also flagged this PDF with high confidence.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=legitimate+free+annual+credit+report+site
    • http://files.mvkofcclubinc.org/uploads/1/3/1/3/131398075/jidilugetu.pdf
    • http://vunages.streetfootballwales.com/uploads/1/3/0/7/130739892/vidika_ponudizofiduka_pevimit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/39652978916.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/lasvegas_craigslist_com.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/27700254253.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/47825575634.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/12132129811.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/bumovisanonamabatenuloja.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/22973359176.pdf
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/fibali.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/pasedofogizifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/augmented_finance_machine_intelligence.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_off00006e28.bin
aeadc150b4ade83e0c69c2ab7cef89e68b2bbd570faa67c2beab99ceab42226f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 5416 bytes
font_01_sfnt_off0000807e.bin
c6f54305700133087348de12ddf6c1a0024f14c1ec88dc836d08b5924bb8105f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 11080 bytes

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