Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e88bbe33c4cf9c…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 16:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c29c59c51747080c40e805d4ebfffd4 SHA-1: 51cf73e6a8ebb9cd05ba3e888408b9b869163819 SHA-256: 63e88bbe33c4cf9c7979b8ce48901d32972cfd20184142178b252f7545998dda
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=d+d+5e+online+character+sheet`, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'd d 5e online character sheet', reinforcing the lure. No scripts were extracted, but the presence of malicious redirector links and the link farm heuristic strongly suggest a malicious intent to redirect users to harmful 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.ru/pify?keyword=d+d+5e+online+character+sheet
    • http://files.seattlefieldhockeysocial.com/uploads/1/3/1/6/131606346/2663518.pdf
    • http://gixoli.tylermany.com/uploads/1/3/1/6/131637814/5100674.pdf
    • http://zabom.miriad-tech.com/uploads/1/3/1/4/131406717/5101392.pdf
    • http://gugesiw.filmnarrative.com/uploads/1/3/0/7/130738799/fadivujolos_fenirefipiz_vonelefobofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/search_engine_optimization_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/povutafez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/lamunoguxokorakosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/mercator_map_projection.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/fudotofejajog.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/soul_worker_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/jadozosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/14692475131.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/power_of_attorney_act_1982.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/38553240265.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_off00005f9d.bin
71d60584b75ac716a37c1a91dbb46a206462bff381b98b357c3618f6c712ed84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5152 bytes
font_01_sfnt_off00007112.bin
68aa959f4051338fb6c149c74af7c1cec4d459622e268c888feeebea89c14747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 15880 bytes

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