Malicious PDF — malware analysis report

Static analysis result for SHA-256 177deb3953b8c5ed…

MALICIOUS

PDF

49.0 KB Created: 2020-08-01 08:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1049600edb778ad67228ad2db06b29 SHA-1: c5c617e97f56dc85af078edb039a3faa4655bdef SHA-256: 177deb3953b8c5ed4b9570085711aac0eaa7ee007511fcd5e4611d3cae3f28c3
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 a link farm designed to redirect users. One prominent link directs to a redirector infrastructure associated with malicious activity. The document body, though heavily obfuscated, contains a reference to "Resident evil 5 treasures" and a URL that appears to be part of a phishing or scam campaign.

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=resident+evil+5+treasures
    • http://files.heydiddlediddlecatering.com/uploads/1/3/0/7/130774970/c17f53c9daa4.pdf
    • http://files.kaseymoran.com/uploads/1/3/0/7/130775965/sixezilewudorelomum.pdf
    • http://files.auroraweddingandevents.co.uk/uploads/1/3/0/7/130738637/d81bb6921.pdf
    • http://files.teeitupbristol.com/uploads/1/3/2/6/132681026/384031a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/12191092213.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/snow_geese_migration_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/basuvote.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/31331781605.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/16502284895.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/45219289661.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/molewivemegifeginojerube.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/xasujatidudaxorum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/dowesakixe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/fomub.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/kunazafelurijititela.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/19844483129.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_off0000831d.bin
821abcb60ec6da095a7bb8c083888cb88cc4458c1641262282b6d99c72340454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831D 5008 bytes
font_01_sfnt_off0000943e.bin
91ee9a6aeee676a8f0230da11a9c48c05a703dcce2f2ffbdf1348d834a7564c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943E 10060 bytes

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