Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cc3fd7932908a1…

MALICIOUS

PDF

51.8 KB Created: 2020-08-30 10:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bbe44b77af8e388f4a8346de790de44 SHA-1: cbb3c1950982dd5c4411a4f224bb3a1dc60dbae8 SHA-256: e7cc3fd7932908a12654e738e0d5752f60bc0afa2ed22fef83043718eef7aa54
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 24 external PDF links, designed to direct users to malicious infrastructure. One of the primary links points to a known malicious redirector, ttraff.cc. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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/wix?keyword=holland+neverland+mp3+ilkpop
    • https://cdn.shopify.com/s/files/1/0463/3005/2769/files/gigaware_usb_to_ethernet_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0440/1663/1973/files/25809848187.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/swimming_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/sufixuvidifura.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/tebenanojagomep.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/luwivotamixabuwuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/98488665607.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/de_aenigmate.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/wixalad.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/bibiguraw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/ruby_sum_of_array.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9208/files/pagpili_ng_batis_ng_impormasyon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eda.bin
375936e0e6483ea5f30a6bda47a4fa64f9a9b972a56705a957fca74d001ce0ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDA 10476 bytes
font_01_sfnt_off00008083.bin
492b3b44d2e4958e129d4da8b3cd2fe0515604230cc96dfd4a0711e9e19d21bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8083 5176 bytes
font_02_sfnt_off00009206.bin
6fbb5159962d5d661587d9795d6d9bd88d75955e6ded06059b7873239f297eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9206 16276 bytes