Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dba4ee09ca1f2c…

MALICIOUS

PDF

53.8 KB Created: 2020-08-15 05:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c70db92344800170f9b050b97dbfbebb SHA-1: 89d3472c43726d397713e7fcbd4fbf21ca3e0929 SHA-256: 29dba4ee09ca1f2c92c6b5bd230a248d276341f3a0f91598819bd24274482a39
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a lure to external content. The embedded URL points to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing the attack pattern. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=mahakal+photo+chilam
    • http://files.burkettbuilding.com/uploads/1/3/1/1/131164198/gejoxojolowesuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/komof.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/xasotegosilovez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/44895666400.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/sevuwofoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/lowaniga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/25455155236.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/51339519015.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/20531283661.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/behavioral_theory_of_smoking.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_off000096d4.bin
dcbf4b485833714c9f915f680de71f0ee40249758d3f17fa5b50e5cda363c866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D4 4968 bytes
font_01_sfnt_off0000a799.bin
7a04f591c1c9497be5af5c7d474a0bbea4bf62d27358c487e0e8e81298674135		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA799 10240 bytes

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