Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a437215a4528816…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 14:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9feaeff8cd66b541c13d884cf125daa0 SHA-1: ee872d028b0a3567f7c79c01ef04a31d0ac8c51a SHA-256: 5a437215a45288164c8fc6b97687396ba18abedaa24e5cbee94fd444b20d5e6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=adios+mother+f+recipe'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious redirection or download attempt.

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=adios+mother+f+recipe
    • http://wugeko.umsmofficial.com/uploads/1/3/0/7/130740141/renitowudovo.pdf
    • http://kakapasak.bluechillithai.co/uploads/1/3/1/3/131397970/5052790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/teracopy_1.22_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/kojusidenujoxad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/77533706521.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/84664750041.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/ranged_training_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0465/4530/5750/files/best_powerpoint_templates_science.pdf
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/5703175206.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/histology_guide_cerebral_cortex.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/31582097908.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/bijuxomufutefipuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/hp_officejet_4620_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/61435563159.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/kuxika.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a1.bin
fa70d9a7d006ef2b3bf62128a435bda226a3851e5dc20ecbf7e326f1e16354c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 5144 bytes
font_01_sfnt_off00007400.bin
1cc23a79879a67e0bb3fc5ac869c1c7250b95c6b62042586b805a8bd7e953ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 10744 bytes