Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea056ed63c0a2e6…

MALICIOUS

PDF

35.9 KB Created: 2020-08-17 04:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb09e4db8681b8b38113994424aa1179 SHA-1: a144ecdccf296e5c1c2699ae49fbf6781ca36a96 SHA-256: 5ea056ed63c0a2e6a36f09720b16a6ee9b4d43d3fe97389a229a2a09d988a1aa
162 Risk Score

Malware Insights

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

The PDF document contains numerous links, masquerading as a driver download, that redirect to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms a high likelihood of a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious lure.

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.ru/pify?keyword=dell+xps+15+bluetooth+driver
    • http://files.nechesengineers.com/uploads/1/3/2/6/132683017/2256902.pdf
    • http://rokelaw.tulalipyouthservices.com/uploads/1/3/0/8/130874197/4211350.pdf
    • http://kutojigew.totalcheerperformance.com/uploads/1/3/1/4/131405927/bafarado-fixapumugijinev-lupakudopem.pdf
    • http://xodonix.westfieldboyssoccer.com/uploads/1/3/0/7/130740558/paronaja_koluzav_jerubibek.pdf
    • http://files.cvccacounseling.com/uploads/1/3/1/0/131070035/cf221566b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/stripe_atlas_tax_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7501/8662/files/mariage_d_amour_partition_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/9862198270.pdf
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/johnson_iron_horse_engine_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/98749411376.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/manual_de_calderas_acuotubulares.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/wubotulinafarekilexepofo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/conditional_operator_in_c_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/puderefoxolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/74198276844.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/kujojewijowulumirel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/78973192343.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_off00004ecd.bin
cb460b08103cacf112ac749966164607d6808c3ed9182caadbbd0f5de60d6df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECD 5280 bytes
font_01_sfnt_off000060ce.bin
7f73f074996dea7ed12e9df9cc7f0b4e26c4ae228e9e844264f1295d60a8ea27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 10016 bytes

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