Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0dd8fd7a1562d7…

MALICIOUS

PDF

98.0 KB Created: 2020-08-06 11:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6250bbad1dafe96b7a0340124fe80b00 SHA-1: f8ace5c68357a1641dac9317cf4923f7d0ab7dde SHA-256: 5b0dd8fd7a1562d7ab789d8ee5afa424a006af151418c8eb1847c2bc7cac99d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, with one identified as a malicious redirector. The 'SE_MFA_LURE' heuristic indicates the document is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=role+of+auxin+in+plants+pdf
    • http://files.tapcater.com/uploads/1/3/2/6/132695568/wotewonebumux.pdf
    • http://zemiwesu.powerinbirth.com/uploads/1/3/1/4/131438137/31456db.pdf
    • http://files.marleysmama.com/uploads/1/3/1/4/131453247/memedidofagij_birukajo.pdf
    • http://files.sojournersoap.com/uploads/1/3/1/0/131070751/kipagetowu_dozexuwenus_kodatinefuke_folugafu.pdf
    • http://files.streetambitionunited.com/uploads/1/3/1/8/131856212/zimazutav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/vusuwasidinotapaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/duxuwanemeka.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/96333380661.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/16302861290.pdf
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/82685708880.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/11303635003.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/12596937712.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7714/files/36662344310.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/zatanu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/34579099254.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_off00013316.bin
f6a28d421c4d46f376ee6f04c098ebaf37f1f0dd114acd349b429634c4110cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13316 4896 bytes
font_01_sfnt_off000143db.bin
c1b77a1bf82cecb6ece96e70258010d28fc3e50b9e17f73f3c752784fd2ad662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143DB 12016 bytes
font_02_sfnt_off00016cb9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CB9 4324 bytes

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