Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df13cdd478cbe3c…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 23:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa63cab2e47dfa79f052033a7376153 SHA-1: d5a512087dd9cfbdd4debd0ca9d2179b6b0c7a72 SHA-256: 6df13cdd478cbe3c9dbe8059b05a32d68b64ae1aaddc7304ff7967113c8b1f05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users. One of the primary links, 'https://ttraff.ru/pify?keyword=extent+report+cucumber+selenium', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or redirection scheme.

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=extent+report+cucumber+selenium
    • http://files.quadrysteria.com/uploads/1/3/2/8/132814990/a1a2c4.pdf
    • http://files.theconsumerperspective.com/uploads/1/3/1/4/131437724/gidamigexagugu-fagoti-vakusila-kififoge.pdf
    • http://files.marriedmarks.com/uploads/1/3/0/7/130738644/1323285.pdf
    • http://files.stvincentschurch.com/uploads/1/3/0/9/130969699/setakoximutep_fekoxekewuso_fobodixovamawe.pdf
    • http://files.marissapriestley.com/uploads/1/3/1/0/131070934/7de25dae92bc00d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/american_english_phonetic_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
    • https://cdn.shopify.com/s/files/1/0448/0057/3601/files/60523658329.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/attestation_employeur_pole_emploi_remplissable.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/33659653395.pdf
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/11114905570.pdf
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/67797003236.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/sarelataguvedisagobedanev.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6552/files/19382303833.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/43570792517.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/93664666992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/75840545134.pdf
    • https://cdn.shopify.com/s/files/1/0429/0628/8291/files/python_hash_table.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_off00007613.bin
7db5ec7d4b67b1bf6fc9332af3d0dfc1feebb8f3545d21d3ce69d1e5298076a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 4916 bytes
font_01_sfnt_off000086ac.bin
7fc6b2a63298bc23534525cddd0048c9074e6ebf54da3ae8b7c0984155dd9347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 14116 bytes
font_02_sfnt_off0000b46e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB46E 4324 bytes

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