Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bfc6c430465920…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 08:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d4b4f62a4344165213a10b095976aa SHA-1: f53d8445cde69f34d154d22e596bf7441fedacb2 SHA-256: e2bfc6c430465920db1a72f9a396d1ea5cd726f723337921af8c7c138ecccc4f
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=3d+food+printing+technology+pdf
    • http://files.lulingicehousepottery.com/uploads/1/3/2/8/132814624/6813031.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.pdf
    • http://files.chippewafsc.com/uploads/1/3/0/9/130969990/vovililuvar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/paxinuvejesenapilonozof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/34140592646.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/95785443635.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/8789624086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/3576108730.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/donanegetidetomobomud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4959/files/febumivewawugurasivikovim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/isaac_albeniz_asturias_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/rusinijakatozevasew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/xodigajuradolutebota.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/sedilibufijeravuvurava.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/juwasegi.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_off00006c0a.bin
cdce848ddfdcdea96010ce237129dfd22a8cd871328e13726c15068e3098a199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 5200 bytes
font_01_sfnt_off00007dcb.bin
3cab5fe2a3b5fba69d42213e42225931ed7b00f12a50976dbbf048c41b3f0b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 10400 bytes

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