Malicious PDF — malware analysis report

Static analysis result for SHA-256 6052b4d5c91c3867…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 04:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49396da328968651d7f82abb99f581f2 SHA-1: 7bafb0ff3e1547440840dba148130d12e8d23d7e SHA-256: 6052b4d5c91c38670ace684a13a7369b6d46a9260e7eec83abcd4072b87f8d98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits a PDF link farm pattern, with numerous external links, many pointing to potentially untrusted domains. The primary malicious URL identified is https://ttraff.cc/pify?keyword=list+of+cephalosporins+by+generation+pdf, which likely serves as a gateway to further malicious content.

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=list+of+cephalosporins+by+generation+pdf
    • http://poriw.thomasvis.com/uploads/1/3/2/6/132682883/jaludivefidijeseve.pdf
    • http://files.pleasantvilleprep.com/uploads/1/3/2/8/132815866/000ae31b35.pdf
    • http://fafuzofof.armanivalentino.com/uploads/1/3/2/3/132302780/kobinak.pdf
    • http://kilitiz.primarysourceseattle.com/uploads/1/3/1/0/131070604/rawezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/69264968481.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/approaches_to_the_study_of_comparative_politics.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/23384448841.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/washing_white_sheets_temperature.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0437/files/referencias_apa_sexta_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2892/files/99816040254.pdf
    • https://cdn.shopify.com/s/files/1/0463/0868/8034/files/40762144148.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/bijivax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/pigidufopetosevexosi.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_off00005564.bin
64a9152ebb0d356602131233a45ccd055ea146a14304c9077ac3c22cba5bd760
pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 5388 bytes
font_01_sfnt_off000067ab.bin
eedfee4b597daaa35981059e4a64588dcb61c03e90c69273070c0fb68c647c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 10420 bytes
font_02_sfnt_off00008b44.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B44 4324 bytes