Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f403505932c103…

MALICIOUS

PDF

38.7 KB Created: 2020-09-09 22:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbeaa247d239885aa3acc929651bdfe SHA-1: 9cf4bf98ab99687d0f22ba1ab463308bdd7646ba SHA-256: b6f403505932c10348ff2a0e7973710f7db2949e811d5a04be1499ed99cfb59a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains text related to 'Hearts of Iron 4' and the malicious URL, suggesting a lure. The primary intent appears to be redirecting users to malicious infrastructure via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=hearts+of+iron+4+wiki+beginners+guide
    • http://files.alanawynn.com/uploads/1/3/1/4/131438282/warogebijajebil.pdf
    • http://files.westernheartsracing.com/uploads/1/3/1/4/131438324/xijifojutogo_lobimemikexiki_vevagupeparar.pdf
    • http://files.watersaltbohojewellery.com/uploads/1/3/0/7/130739007/564980b3e.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/46631707850.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/33599490688.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/58447504417.pdf
    • https://cdn.shopify.com/s/files/1/0472/2573/3285/files/19733064611.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/how_to_iterate_through_a_map_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/constancia_de_estudios_ug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/fl_studio_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/cambridge_latin_unit_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/neoliberalismo_peru.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0959/files/40212797552.pdf
    • https://static.usrfiles.com/ugd/834936_e6e2ad1b66c7452e858173cdcc5e71fb.pdf
    • https://static.usrfiles.com/ugd/61b8bf_f305fa688e9c417d8b3f3a37a3e64912.pdf
    • https://static.usrfiles.com/ugd/ad2ade_0ced21f72a8f4af9be952cd44eec9ff2.pdf
    • https://static.usrfiles.com/ugd/7f16bd_9e48242d58b24e75be2dc55eb0489f46.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005820.bin
643b7e60682c0c2a93fc2aeacf354fe9f9f79b548e7c14f3d6619220690f1000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 5388 bytes
font_01_sfnt_off00006a98.bin
c6c923b983bc92564e9cde75e0f72b8191d6697c26a76416d4f52ba52ad91adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 10280 bytes

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