Malicious PDF — malware analysis report

Static analysis result for SHA-256 7727bdd7bc7499ec…

MALICIOUS

PDF

48.1 KB Created: 2020-08-05 08:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d205fe58d7674b4b3cd5b4793679f50 SHA-1: 4d5b787ea3eb9e0663d8c18cc6a80ecfdac41517 SHA-256: 7727bdd7bc7499ece23ac88037b41d9ed04ee92ab34d8147e59d3d8193b999bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.cc/pify?keyword=direct+sequence+spread+spectrum+pdf. The document's structure and the presence of numerous links suggest an attempt to exploit users through a deceptive link farm, likely for phishing or malware distribution.

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=direct+sequence+spread+spectrum+pdf
    • http://fixoke.garyphotos.com/uploads/1/3/1/4/131452903/c2a56b031b4.pdf
    • http://files.sashatnattat.com/uploads/1/3/1/4/131453215/rufisel_pupejerala.pdf
    • http://files.hansonfoodpantry.org/uploads/1/3/1/4/131453188/kuwogopuzil.pdf
    • http://files.poetsespressoreview.com/uploads/1/3/0/8/130814118/xikiw.pdf
    • http://files.614barbersupply.com/uploads/1/3/0/7/130739398/f1dd791.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/acca_f6_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/vemenififesun.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/zafasuverazedulividujuvew.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3215/files/66458222325.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/mopatabezifowemutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/xinivupawavujiviz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/terewexivet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/supigibudazeva.pdf
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/90201944242.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_off000066d1.bin
5cb8510eb7fd4358b157ecbabb36c6f74f8b389d1ed2842fb2b1dc9473719a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 5164 bytes
font_01_sfnt_off00007844.bin
1bbefed0af2f222f7fe3a0b239e8bcc6f5467667d4737f3de05e0908fc971ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 13500 bytes
font_02_sfnt_off0000a2dc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DC 4324 bytes

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