Malicious PDF — malware analysis report

Static analysis result for SHA-256 20291ad676ea77f0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 00:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8429bd058fff0f4603d3b7dcd7fa02 SHA-1: 220dc8fd817e353b24a843c2eb5fd233ee637145 SHA-256: 20291ad676ea77f036c87cb0234698a06192cd209c2b99c1f32e3d7556df5afe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector, ttraff.com. This suggests a link farm strategy to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links within the document.

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=arthur+miller+biography+pdf
    • http://bewab.drclaudetteking.com/uploads/1/3/0/8/130874633/630595328c4aa.pdf
    • http://files.cedartboats.com/uploads/1/3/1/8/131856170/5960853.pdf
    • http://files.apple-tutoring.com/uploads/1/3/1/0/131071209/fejemirokapo.pdf
    • http://files.magicaladventurestravelbystacy.com/uploads/1/3/2/6/132681767/tujimon.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/minecraft_rpg_server_with_classes_and_spells.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/lorajewipazodonitu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/check_version_of_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/xobenudawurakikilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/wiferutibipepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/34619526475.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/dark_souls_2_cheat_engine_table.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/wojopadirarogozux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4732/1751/files/nasubufuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/67615429532.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/63751102742.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/pegepazelirakuwesubogil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/western_union_hacking.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/always_forever_chords.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_off00006ab3.bin
4f64e2d85030aba141b6fd608b5174abf1297b691d420fd440c5c9d8ec130908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB3 5508 bytes
font_01_sfnt_off00007d53.bin
b9a63acc1542efa0731e6a7d4c5301cb55c3bc76f0e18dfdd042f41a0896551b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D53 9920 bytes

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