Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cccc2f4014b42c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-09 04:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e78661bdc8940c31693b3497f54c263 SHA-1: 74ffbdac0465c20e12bad81c360d7e20559df3b0 SHA-256: 03cccc2f4014b42cd2cfdac17f3daa5bacacdc9c7bfa34defe0d53cc26cdfb7a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=autotable+jspdf+options'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users to malicious sites.

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=autotable+jspdf+options
    • http://files.pchstv.org/uploads/1/3/1/1/131164473/xipixanatamegadeke.pdf
    • http://files.tartarosjapan.com/uploads/1/3/2/3/132303310/6197928.pdf
    • http://dadobag.vacationsbyreba.com/uploads/1/3/2/6/132680813/dfdfa3cc38.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/foxilubepupilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/952339627.pdf
    • https://cdn.shopify.com/s/files/1/0434/5616/8093/files/kojerimoduwogedefepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/10444071571.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/bedefif.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/88158971559.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/75939386233.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/73322044204.pdf
    • https://cdn.shopify.com/s/files/1/0436/1725/5581/files/managing_business_process_flows.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_off00006701.bin
65260e47897a04c43170677be2a17a1f3d10df917628b6b4d58b6346363c25aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5144 bytes
font_01_sfnt_off00007892.bin
c4a3e1e788d000578eda6416f9aaf72bafbed532d2faf79c3bdd644b921bbd08
pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 14480 bytes