Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205cf6ee71a3f9e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 16:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5692b09d52d5c69bc1bb765908d863b SHA-1: b1f32eb8572f214c9f644011e70bbb911951f1d9 SHA-256: 8205cf6ee71a3f9edff14a3bf6a6f5e8e5e2a0feccd3dd839ff1ccbee26546da
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes the URL that leads to this redirector, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.com/pify?keyword=donell+jones+where+i+wanna+be+download
    • http://files.stsjlj.com/uploads/1/3/0/7/130776158/jusezufif-kulif-bilagatukalaku-tegufowoxibowox.pdf
    • http://files.primalpracticemt.com/uploads/1/3/0/8/130874122/jowutolovut.pdf
    • http://files.eosfinancialplanning.com/uploads/1/3/2/8/132815752/jakove.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/27486467779.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/16297197690.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/vanilla_wow_cooking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/fadefujuxunupufalom.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/30499923266.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/29161739558.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/41709909656.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/nedodivawefejizavez.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/vetogun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/51428439313.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/89936362803.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/15902281698.pdf
    • https://cdn.shopify.com/s/files/1/0430/4214/4407/files/safotux.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063df.bin
8bbc1188c956bd7ebf4c8e532d6073b99e1c13de2b006510182ceb9fc7e66f36
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 5220 bytes
font_01_sfnt_off000075a9.bin
4b36555180541dc27c6edb246269fa0ef2c2ac562243e3d661e32dae178eb864
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 10608 bytes