Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b13593dbcb5ace…

MALICIOUS

PDF

101.8 KB Created: 2020-08-03 17:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b28bd2f8fd8143cec4be8af49676f12 SHA-1: a81b2cc97304e5276511de58695d47d662ced0b2 SHA-256: 70b13593dbcb5ace70ad7ae382e06ff227068237d560ec0266968983cc7bb8b6
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 pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious objective. The ML classifier strongly supports the malicious nature of this PDF.

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=nice+antenatal+care+pdf
    • http://files.geologicalsocietyct.org/uploads/1/3/0/9/130969220/xediwur.pdf
    • http://files.grittygoblingames.com/uploads/1/3/2/7/132712006/nibabonulunuvuvu.pdf
    • http://powimepo.hermanngardentours.com/uploads/1/3/0/7/130775612/vazasidanolena.pdf
    • http://wepopik.breezyridgegsmd.com/uploads/1/3/0/7/130776046/6892431.pdf
    • http://files.housingamericacampaign.org/uploads/1/3/2/6/132681443/5943200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/kaxijozebakosir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/dikemitozuvotebabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/siwexum.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/43567991357.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/biomes_o_plenty_gems.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/32877371503.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/42097731076.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunixa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3598/1974/files/wesew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/jesarugaxixepejutogovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/walmart_mossberg_500.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/nikabitusejabavilejoxapa.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_off000154f2.bin
a7e56ba54bd61b57daf96c18712366d894b0bc95a4deb1fe2f065278c33c3941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154F2 4940 bytes
font_01_sfnt_off000165d7.bin
fb7b3692cc1a03cdc4cb60810cd3703054ddb9eb5b077b9cbaec429652c0a094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165D7 10552 bytes

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