Malicious PDF — malware analysis report

Static analysis result for SHA-256 934b3b558a1cc1b1…

MALICIOUS

PDF

53.6 KB Created: 2020-08-30 20:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f542c71364eb9a72d65c240a77b24e8f SHA-1: f3280675a889f7b0feb42b804eeba516879e524e SHA-256: 934b3b558a1cc1b17836233d46d5a30519ca28f6df6799472150b4ba005e2ee1
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves to obscure the ultimate destination of the attack. Another heuristic indicates a PDF link farm, suggesting a potential SEO poisoning or spamming campaign. The document body contains garbled text but includes the suspicious URL and several Shopify URLs, some of which are benign. No scripts were extracted from this sample.

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=ronco+rotisserie+4000+manual
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/79266485705.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/59252164775.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/vutapavisizosudubiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/41436981176.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/90258214299.pdf
    • https://static.usrfiles.com/ugd/f967ac_a3ce852bc4fa4b8a99d9443b573ae695.pdf
    • https://static.usrfiles.com/ugd/3aee12_f65b3dbd65174e0996d4da659f8f207a.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/type_your_answer_here_traduo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8282/files/cryptococcal_meningitis_treatment_guidelines_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/libulikalu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/kasamasof.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/38913668529.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_off0000939d.bin
324749b283464395b680a4a1e3cb29242f34a1f65dabb5f345fd9eeedc4f5a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x939D 5184 bytes
font_01_sfnt_off0000a526.bin
b2a3df2330cf151cecd6476b6b85bb531b9a18f34be2d28ba0da6c87a4779bd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA526 10972 bytes