Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b1f00098bd3c2d…

MALICIOUS

PDF

40.7 KB Created: 2020-08-11 15:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743af91998bd202660f1de9ce2b8c678 SHA-1: a38df077b5820cb96db013a6f930e7fda75bbe41 SHA-256: 78b1f00098bd3c2d411bdac4fc7cf64a8a6ca57833a8721a63816a5c4b129d17
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=trabajo+de+energias+alternativas+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=trabajo+de+energias+alternativas+pdf
    • http://files.tysonwestley.com/uploads/1/3/1/4/131483391/9714944.pdf
    • http://files.giorgioceccottidesign.com/uploads/1/3/0/8/130813413/nubazolufox-pewasovujum-wonok-milojekevuzaj.pdf
    • http://files.redhoundstudios.com/uploads/1/3/1/4/131408170/295b037b86.pdf
    • http://files.e3aerial.com/uploads/1/3/0/7/130776542/jegirusejamen-vugifufo-lerig-tetudo.pdf
    • http://files.cohobrewing.com/uploads/1/3/0/8/130873957/futabadufak_jamifadeluda_woketewuragix_fegibirifemalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/pupupolapus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/timex_ironman_triathlon.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/mujixujogadulutobew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/kanefav.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/bstc_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/45909650069.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/dofexuzowat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/artikel_akuntansi_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/58656306706.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/fojuforegolijebabixim.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_off00005db2.bin
d422e6ac5a26e4ebde17e3727c695b3a772aa74956ff761b843a81fe83bf1425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5432 bytes
font_01_sfnt_off0000704d.bin
6def434bc19c55954f0989c9b176057103dce0d0dfd6464b168b294a2bb9721c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 11004 bytes

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