Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c0c96f79529fc2…

MALICIOUS

PDF

35.5 KB Created: 2020-08-07 19:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168a527de3366a8503dc9323da805f9c SHA-1: 7c1dcd541b8dc14676deafc9cb763bf08b694ac7 SHA-256: 08c0c96f79529fc2e10ace631c4c82a855b2fba180d62b7b77062c2e014380a2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. A critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier strongly indicated maliciousness, and the document body, though garbled, contains URLs that align with the observed link farm behavior. No scripts were extracted, but the presence of malicious redirector links and the link farm structure points to an attempt to drive traffic to malicious sites.

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=aircraft+weight+and+balance+handbook+faa+h+8083+1a.+pdf
    • http://files.dianabeltranherrera.com/uploads/1/3/1/6/131607269/7aafe5.pdf
    • http://files.jbeautyusa.com/uploads/1/3/0/8/130813846/5be516004ac.pdf
    • http://files.trainingwithfausto.com/uploads/1/3/1/3/131398143/lofesopilekeligun.pdf
    • http://files.activeinitiatives.com/uploads/1/3/0/8/130813314/2702984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/26394041552.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/7188260797.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/gegeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/puvakefotuwopizifezen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/gimuzijadusadi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/kadukezezopuriwepolixubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9175/files/20513630244.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/tetivitusugewilale.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/wakemokutolikikakidexeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/fap_titans_cheat.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_off00004ab7.bin
e2ead31f814272942038de87972e79db401ef43b903e38b7f6beb8226d532a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB7 6108 bytes
font_01_sfnt_off00005f91.bin
90e89ff480da3eb3f1264552579942995fd648423054ec782a52ca98cd51a3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 9764 bytes

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