Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32e563e1480a981…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 12:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7790b8c323dd37b6db63a824c963c13 SHA-1: 4c14fd6366c9b9268ee7237d2321c64b9d44ddb8 SHA-256: d32e563e1480a98196f99188dc0b02cf898f29d49270f8e5591bb55faa19fbb6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Address format canada resume' and the malicious URL, suggesting a lure to trick users into clicking on the links. The presence of a malicious redirector and the sheer volume of links indicate a campaign to drive traffic to potentially harmful 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.com/pify?keyword=address+format+canada+resume
    • http://files.firstgenleaders.org/uploads/1/3/0/8/130874192/mepiwaloxoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0832/6812/files/totuzumewopeteperuxil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/masumojewipidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/css_gradient_background.pdf
    • https://cdn.shopify.com/s/files/1/0452/4769/2957/files/bareilly_ki_barfi_free_movies_counter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/60103130621.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/3998449765.pdf
    • https://cdn.shopify.com/s/files/1/0448/0984/6946/files/pufarokawawesawava.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/xikomenotaxijikaremag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/sigazumut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/bexev.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_off0000636f.bin
4a9240c5a12a9a6c6b811815d2d2c0c6e1d71d0d173805b281b277a88b3ed54b
pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 4956 bytes
font_01_sfnt_off00007425.bin
a11a8fc00ff58048aeed24812ddc56fac6f35cf8aae6b8ec45892eb66b195135
pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 9936 bytes
font_02_sfnt_off00009627.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9627 4324 bytes