Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e34804a3e11fd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-02 18:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8fbeeec9b99ad945362b574bdee96fb SHA-1: c8ed1d145b87ec40acea53e74222b62575817969 SHA-256: 002e34804a3e11fd8ca1c3b2022c24d8bd19d9847383451e30e54b351d6ced5d
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a large number of embedded links to external PDF files, suggesting a link farm or a distribution point for further malicious content. The primary malicious link identified is https://ttraff.cc/pify?keyword=quatrain+form+crossword.

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.cc/pify?keyword=quatrain+form+crossword
    • http://files.321letshavefun.co.uk/uploads/1/3/2/6/132695531/347e9f.pdf
    • http://files.durandsmith.com/uploads/1/3/1/4/131482975/7196411.pdf
    • http://files.hypnosismo.com/uploads/1/3/1/4/131407226/xubakifukara-wezut-boxuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/vadexamireg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/xexowalixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/87107454336.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/vezazetifatiguzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/fejeluzefekavedudubipid.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/73741238066.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/vadenoliluzidazeposix.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/73223623472.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/moxelitibonofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/97181632885.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_off00005ff5.bin
452f3165f585d49d39bb286ff005d58685ffe88766c22d36e02c20abcfe19503
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF5 5288 bytes
font_01_sfnt_off000071f1.bin
750d786f6f7c59a6923305a55662566923da622eafbc5017856a077a0c66cb2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 10112 bytes