Malicious PDF — malware analysis report

Static analysis result for SHA-256 62caf33ac47f94d8…

MALICIOUS

PDF

48.6 KB Created: 2020-08-30 21:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d60bdf68868cb11ae93771712d70082 SHA-1: b42410a5b1896175039d57452077e70b4f1c6b14 SHA-256: 62caf33ac47f94d804b79c453e940d972f02219d418e5ea821d468e74ae95277
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=interdictor+cruiser+wookieepedia', which is associated with malicious redirector activity. The presence of numerous links to external PDFs suggests a link farm or SEO manipulation tactic, potentially to obscure malicious intent or distribute further payloads.

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/wix?keyword=interdictor+cruiser+wookieepedia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/0332/7142/files/restaurant_management_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/nyc_food_handlers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9242/files/chiari_malformation_symptoms_adults.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/sobomofuxijesemari.pdf
    • https://cdn.shopify.com/s/files/1/0437/3820/2273/files/52309761953.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/folding_adirondack_chair_plans.pdf
    • https://static.usrfiles.com/ugd/e5a943_bde655f0e5544a53bd1cfafd4fd322f6.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_cf4b3c0b9fe74700afd1aa292190ec58.pdf
    • https://static.usrfiles.com/ugd/73c254_868c583a13ef46f491bc33f935ea4d6c.pdf
    • https://static.usrfiles.com/ugd/80bfa9_48dc6e01a31e4ea0bd7537431c0c5b6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6121099b4b3845219d4bbc06114877e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_17995a2bf20845c4b2eb9345ba82413d.pdf
    • https://static.usrfiles.com/ugd/b8c837_011ee482c42747bb8269afe427eaeec7.pdf
    • https://static.usrfiles.com/ugd/87fdc7_d5d2a093fd3f404d8d2a615afd6b82c9.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_off00008173.bin
268b3208874464def02b87336dab5fac34a3d2dd5b704cda9423e15bf6b19bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 5128 bytes
font_01_sfnt_off00009300.bin
cc12bd287e29b0db992bef2ccc06214e028decc642ee10a06e8f5a9b0f101ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9300 10152 bytes

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