Malicious PDF — malware analysis report

Static analysis result for SHA-256 6614d33c26419846…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 16:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa34a201b85c7f2c1b6dbbbdacf2ce2 SHA-1: f9e0c2266a8b1e4cc65b69f4fb1b53350f507f12 SHA-256: 6614d33c26419846d48a9ba953d46cf82c97711442f0a915a4114e06e43f9c8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes the same topic as the malicious URL, suggesting a lure. The presence of a link farm heuristic indicates a large number of outbound links, many of which are to Shopify, likely for SEO manipulation or to host further malicious content.

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/wix?keyword=list+of+types+of+joints+in+the+human+body
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/habitual_buying_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0457/3636/2140/files/mazitibazupapowoxus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/nojafepakoweborokapexuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/nanomaterials_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/libumavedatimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/hong_kong_train_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6014/files/english_in_use_3_eso_burlington.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/41331212083.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0135/files/mafepexivojemaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/free_weekly_behavior_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/29578959305.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9d.bin
473651d7857a0bbdb60693ff0ef7f67279200001af9325893674e3658fac7513
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9D 5292 bytes
font_01_sfnt_off00006e76.bin
fac24760fc903f22b18fad05be8adb72ab60f5f2a4d67b276ab79c404492a8f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E76 9832 bytes
font_02_sfnt_off00008fec.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEC 4324 bytes