Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5dd69bd0b7e1a5…

MALICIOUS

PDF

45.2 KB Created: 2020-08-11 19:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b287e68230a8bfbe339fd3f53f00af SHA-1: 4301b6e8ed434a39f45e54c7d5fd1dec6faa52e6 SHA-256: eb5dd69bd0b7e1a56301cf39e2192d3263ff9fc6a57094c5876a4f1518e4b1ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning attack designed to redirect users to malicious content. The ML classifier also 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.ru/pify?keyword=spectrophotometer+principle+pdf
    • http://files.philbricksgenerators.com/uploads/1/3/2/7/132741339/3374ed11.pdf
    • http://files.lightthewaytraining.com/uploads/1/3/1/3/131380841/botegifugevugigozeku.pdf
    • http://lewumuv.aerosportoutfitter.com/uploads/1/3/1/1/131164250/2adce598fa31.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/jodudoxozorogapi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/poxibodiraxiraxirefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/imazing_activation_number_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/87329287655.pdf
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/best_english_translation_of_quran.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/deruxenogusovebenibofex.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/wonafodejawinati.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/58337847834.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6578/files/haemopoiesis_and_formed_elements.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/wovobemojubapakiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/gewanawijewijezi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d5.bin
643210e03b9853cd866395b148d862db9cb31fb8a15835fbf4778f5d0cb61378
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 4900 bytes
font_01_sfnt_off0000764a.bin
24945ad3c7ccb98b4e08a5816c371cac42246ffbabac28f46208ee1c21ba8495
pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 10484 bytes
font_02_sfnt_off00009a0c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0C 4324 bytes