Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d0985c9f138fb9…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 09:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e71794c3390bc7afd14acda5f0cc2472 SHA-1: f724abe0cff08c1f009a672557f66a1a999ce1f5 SHA-256: e0d0985c9f138fb90c595d78f322cd42f45e198f16f53759ee06cacd1f701cf5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Vegetarian healthy recipes pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious links. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=vegetarian+healthy+recipes+pdf
    • http://files.hirzelinteriors.com/uploads/1/3/2/6/132681783/junugikozetave_wudulatabemeba_teparolos_gevijobugudut.pdf
    • http://mudopib.randomartsnow.com/uploads/1/3/2/7/132710507/621612.pdf
    • http://butazo.jamiegracehair.com/uploads/1/3/2/7/132712050/452428.pdf
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.pdf
    • http://files.alfonsotaxservice.com/uploads/1/3/1/3/131378932/pufadudara.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/86747344145.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/dixakoxaxigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/67981612532.pdf
    • https://cdn.shopify.com/s/files/1/0447/0459/6122/files/copd_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/vuzapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/xolol.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/crossword_puzzle_answer_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/48916177925.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/26888627726.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/87273503068.pdf
    • https://cdn.shopify.com/s/files/1/0428/4032/6300/files/nutritional_information_raw_carrots.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_off00008264.bin
4db123420fba5376dc09a7dc1d0758c145be487b56c56ec127b5d1a0c8fc7a4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 5484 bytes
font_01_sfnt_off00009505.bin
7fd60c2774da0f99a403d870a41e1ad303eb6f1fb80f314adc80f48596d042dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9505 10292 bytes