Malicious PDF — malware analysis report

Static analysis result for SHA-256 0265031d545de745…

MALICIOUS

PDF

63.6 KB Created: 2020-07-30 22:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca75028f575323bd50f46e4000935169 SHA-1: ffe49b11bf6557d97fb933d1625b3097629461c2 SHA-256: 0265031d545de745b8f06967f8b6050f28c47c893298ae4d05471a25d1c1009d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a potential distribution point for further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=genetic+engineering+pdf
    • http://files.paventcamp.org/uploads/1/3/1/3/131383982/nodebegeretitorebe.pdf
    • http://files.foundersbendhoa.org/uploads/1/3/0/7/130775304/gatirepovitaxu.pdf
    • http://files.waterswheel.org/uploads/1/3/0/7/130776120/5474fc44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4233/8981/files/sasuziposixilideto.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/69766602601.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/zozunajenavakefavuno.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/fisotabuwajetekapax.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/91690862102.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/90634082397.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/sezifenosuremenomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43692268827.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/59878238317.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_off0000b1d1.bin
d7d013408685d1bf1dc1dee1d90893ea0daaa0e4e5db9584292ef4d00e01cff0
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D1 3304 bytes
font_01_sfnt_off0000bdb5.bin
3d3b45408905274301b741859d7f5d7c52d862edbb262270eba15e6357999a19
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB5 4612 bytes
font_02_sfnt_off0000cd78.bin
f0b03ec71905d98d2a49d7732c1e49298686c921c9ec4d3971fa0f8f7b9f02a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD78 10388 bytes