Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ab325f4f409900…

MALICIOUS

PDF

45.6 KB Created: 2020-07-25 11:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c58f357fa5e4ce3058e7f4f193b766 SHA-1: dd9e74c503ead25f3121a69083b93a232f1964b4 SHA-256: 68ab325f4f4099007c2a72d0d488a975bcb67a5aaf5329a5a4f97e3e95e1a7c5
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links hosted on platforms like Shopify. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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=show+asterisk+password+android
    • http://files.gobeyondracing.store/uploads/1/3/1/4/131407796/lozuwineketeb.pdf
    • http://files.sklgtraining.com/uploads/1/3/0/7/130738614/6a27a.pdf
    • http://files.spiritwalk.info/uploads/1/3/2/8/132814990/zoguwidis-ritoputabese-zanuzizuriwiwa.pdf
    • http://files.breannpattyphotography.com/uploads/1/3/1/8/131871785/7696701.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/76883752597.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/rabaxugogesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/76104821292.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/fomapirubonesizako.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/2846997871.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4734/files/vesereboposedugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/26830172196.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/94252383829.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/tudazerafobulofidulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/fevaxexogupozanubareb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/xujixefezasakijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/bilevenubixowoletisugafor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/wogugisabipivevel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/naxovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/vikonomatapisaxifuvowez.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_off00007517.bin
e7a3ea26d4ee4694b1e6b0b6901c52f04670cc91a097c030031baf47633cee1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7517 5064 bytes
font_01_sfnt_off0000864a.bin
8f6c48f750dea152069623bfe662578cc50c786d2cc9b484d0a96edd3694689a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 10260 bytes

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