Malicious PDF — malware analysis report

Static analysis result for SHA-256 12126233a6dbf83e…

MALICIOUS

PDF

32.3 KB Created: 2020-08-19 13:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e9e3b4d2c668b2c00ce78f1a94318e SHA-1: 0c915f02ddfeac76ff0e8a88bd65b44f5dc619bb SHA-256: 12126233a6dbf83e75b73f6cadb2fa557c692114633e092c1d0b3b2006c2916f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to trending songs and videos, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=trending+nakhra+song+whatsapp+status+video
    • http://files.shirleywulab.com/uploads/1/3/1/4/131483662/timufewi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/libro_bestiario_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/ppt_keren_animasi_pendidikan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/fufizuridugajepef.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/microsoft_excel_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/2547663463.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/rinawewiwelovozidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/mezerenonuramodija.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/tamil_thriller_movies_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/93257664003.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/mibunanezilesifan.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/rajopiraxuxixupuxerusavo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0513/8328/files/falodewoxijamitol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044fd.bin
5a577b6e1cff594ff099bba621c4b04c7e2d6dfcaacf144e2fde70ffe2835487
pdf-font-stream PDF embedded font (sfnt) at offset 0x44FD 5356 bytes
font_01_sfnt_off00005744.bin
3eda527491880d7fd72bce9890fe9aa45af10876a98d014005b5b44c78c18984
pdf-font-stream PDF embedded font (sfnt) at offset 0x5744 8392 bytes