Malicious PDF — malware analysis report

Static analysis result for SHA-256 0087026604077de9…

MALICIOUS

PDF

55.8 KB Created: 2020-08-05 05:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a80b1db4a318c6f28ae4b498e4d8b1d SHA-1: bdb4f7ec4ca72c7383f1cda99f2d245f66d9024f SHA-256: 0087026604077de9d239f786a67aef555328960c78fd01e0123874cbc64fb125
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes the malicious URL and mentions 'Comptia a 902 practice test pdf', suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=comptia+a+902+practice+test+pdf
    • http://files.theglasscarousel.com/uploads/1/3/1/6/131637570/simetotofo-deporupigid-jobefimo-jemavewivipowek.pdf
    • http://files.harmonyorganics.net/uploads/1/3/1/8/131856276/acadee41a.pdf
    • http://bavepu.wectp.org/uploads/1/3/0/7/130775840/bidelad_vororuposigupa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/67554318761.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/vojatovavitudezagimufuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/togadinovotezat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/how_to_calculate_ac_5e.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/leboduvijol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/54476432020.pdf
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/80951707255.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/nokav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/dokafejonazomezaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/pdf_file_reader_free_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/kawitunifogema.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/rupedutikomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/gasometria_de_cordon_umbilical.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008406.bin
f670401fb1320113fce50824557102bfce0e45329a17bad0921cee5e871aea82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 5604 bytes
font_01_sfnt_off000096f8.bin
7e2b531485085a81e2bdb664d0526fec187ed1920924678c9ccd95d8635f80e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F8 10900 bytes
font_02_sfnt_off0000bc6e.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6E 16204 bytes

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