Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e79b170a3bb9478…

MALICIOUS

PDF

41.0 KB Created: 2020-08-29 07:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eaece51d9ee88a0a59e73838c3e299a SHA-1: 86af6e0869b2c176ea36dbb98676cc5b83401e37 SHA-256: 1e79b170a3bb94785c620463d7ed231654d949b1b04915931a515137e1d5b92f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a search result for 'vw beetle manual pdf'. The document body also contains this URL and numerous other links to Shopify-hosted PDFs, indicating a link farm designed to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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=vw+beetle+manual+pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/rubadamovosojumugelek.pdf
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/wotupetumotuzab.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/ridat.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/does_blood_stain_white_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/aluminum_extrusion_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/lakofizeninoputisu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/bawofogizurezinit.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/zudovisiwijusaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3621/files/57462936200.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/rinejow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/bed_sheets_king_size.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/capteur_de_pression_d_huile_moteur.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_off0000635f.bin
6d37a5627fe45d907a583d4f42775ff0bc849895997a32d6dc67d20cf7d7660e
pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 5112 bytes
font_01_sfnt_off000074c2.bin
422b4295718c6171c280cf19ea5743e93b6074b2a73f93fd1cdc47d0cb5d8254
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10240 bytes