Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6be74194386982…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 16:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7a595742abdce838d37b7cc2e1cf0d5 SHA-1: 863d5ebc6362a113b532e6fc45b7d35d6751a730 SHA-256: 5e6be7419438698206608895df6d3d58ad63d4cd0795ad7a292897b9af7fcce2
162 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 Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=advanced+computer+architecture+kai+hwang+pdf+download
    • http://files.desireewagner.com/uploads/1/3/1/0/131070911/5af2c02d9b9.pdf
    • http://files.glutenfreeinokc.com/uploads/1/3/1/3/131384081/1ce90.pdf
    • http://zaporawes.academiestjohn.org/uploads/1/3/1/4/131437246/6814025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/11282298079.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/kepatugonawamomemusof.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/shadow_of_mordor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3029/files/chrome_remove_autocomplete_url.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/15501165426.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/6.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/wetubaranasofavozak.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/1996_jaguar_xj6_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/17806173352.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/mk_vs_dc_universe_moves.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/nipilemevexabupovawewofeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/8656073774.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/posuv.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_off000049b7.bin
5bc71c844141d945a67afa7fcbcac10260da1f282e26a4f7f51f78de7abfc4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5596 bytes
font_01_sfnt_off00005ca8.bin
5db7975863dc866ff0cbb641873b1caf9eaa0b62fa5e6472105dcd26f85ae149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA8 10684 bytes

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