Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bc18619b9addc9…

MALICIOUS

PDF

53.0 KB Created: 2020-09-03 01:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51457cb28e547a6d35e4a858bccae823 SHA-1: 947d1bb3767cabd9a3bfa0d6398b8623133829d6 SHA-256: 17bc18619b9addc913afc08ff811be08f8815fc0b7ec3ba78c7ab08930678401
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a fishing report and the malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the primary malicious URL.

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=fishing+report+galveston+offshore
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_119944b4b5ee4258828b5250fe89c084.pdf
    • https://static.usrfiles.com/ugd/db1da1_2b5d81a809334db8b517729c52830da7.pdf
    • https://static.usrfiles.com/ugd/3fd21f_1becc601ca65405e9c25ac71e5de267a.pdf
    • https://static.usrfiles.com/ugd/b42fd6_8bacc97deb034291b6da62d7af4cb9fb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2023/8503/files/nufaxasalixared.pdf
    • https://cdn.shopify.com/s/files/1/0433/1343/0686/files/fifizezipotedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/akit_tiwari_song.pdf
    • https://cdn.shopify.com/s/files/1/0448/0411/2545/files/defectos_en_el_cierre_del_tubo_neural.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/36628330864.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/8780313492.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/piano_chords_chart.pdf
    • https://static.usrfiles.com/ugd/97aff7_8a3fb9b922d54f5a89bdc271e04a6db8.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_d85b2715504a40fc97e399cae39dca76.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_27b4721d22ac4477a57ed7b253d19238.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008462.bin
b5bda11425eedaa1a73bfec4a557781a4c5bece281c7688ef0fb6c4da7f28490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8462 4964 bytes
font_01_sfnt_off00009537.bin
cf05e821e09b9a4c0ab4def73cab4225b36aafb74b0d57a92ef6b6e930fe6f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9537 10408 bytes
font_02_sfnt_off0000b8d8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D8 4324 bytes

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