Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c416629ba181df7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-12 00:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c533ac0f816e516782d9feaa96c6305 SHA-1: d41346c141f2e55e17c62cb3f79c21f4bc1eb220 SHA-256: 6c416629ba181df77653d03299134a3b5a19d5181cf4f5801a5aa1dbb6d073f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'mobile phone signal jammer circuit diagram pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm used for SEO poisoning to attract victims.

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.ru/pify?keyword=mobile+phone+signal+jammer+circuit+diagram+pdf
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
    • http://files.godancedynamics.com/uploads/1/3/2/8/132814990/8b930b.pdf
    • http://files.mymountains.fr/uploads/1/3/1/4/131436956/a12e21d8d.pdf
    • http://files.the320club.com/uploads/1/3/1/4/131454523/1855040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/pocket_anesthesia_2nd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/69875672986.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/gevagubesetesega.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/toxibe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5645/files/gojunukupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2871/files/lipubepobegenamazupovukut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/sebegujaxuvaxes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/robot_hat_terraria.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/ninukenepawifem.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/rujulamesutiposi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/75174951974.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/panokokovubibabajavukaw.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_off00006734.bin
622558c1e83a6a8e6e73af151c1da181bedbe583c9b50f9d53dbf1dd45073353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 5672 bytes
font_01_sfnt_off00007a48.bin
63db4fdbfd233fcb96973e131c094f9ef3247fb5cedae96c862132a848dd2bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 10012 bytes
font_02_sfnt_off00009c77.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C77 4324 bytes

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