Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee01284fb3b0ef8…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 17:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7303b94c257987787016f20ca1768bb SHA-1: b90b7cc81f9bc98a3f2ecb1c51b6ee245d0836e4 SHA-256: cee01284fb3b0ef85519278ceb581d2de18a40ac3596c799f2d637bc8f7b7b85
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirection tactic designed to lead 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.com/pify?keyword=gaseous+element+crossword+answer
    • http://files.ourharvestmoonhomestead.com/uploads/1/3/1/8/131857308/dugixipisogudes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/47783299797.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/10470353012.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/wejoxepopopukunejofuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/rekufopinin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/20723400878.pdf
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/98099414989.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/37045625615.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/lezusufubuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/30198473276.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_off0000690d.bin
410e3ad23b0f5830a403fbde39a045bdf584b395ef33245f698b115522939aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690D 5208 bytes
font_01_sfnt_off00007ac1.bin
8b0ec47819977cd3f388963f6d401fb39221b6ba26a52a63437cbdc38729a9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC1 10312 bytes

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