Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dabd18b3c99bf8d…

MALICIOUS

PDF

35.3 KB Created: 2020-08-13 21:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7efd381ff34c8839fecb714fca230bd SHA-1: 1a058e13d0e69764742cd1e2b7453bb60e58d565 SHA-256: 6dabd18b3c99bf8dce51a92eff78abc497b61eb0f5dc71c253697016bdb2d2b2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse tactic. One of the primary links, https://ttraff.com/pify?keyword=chicco+beside+me+crib+sheets, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, indicating an attempt to disguise malicious activity as legitimate content. The ML classifier strongly flagged this PDF as malicious.

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=chicco+beside+me+crib+sheets
    • http://ripok.cubbingtonandleekwootton.net/uploads/1/3/1/4/131437736/bofej_ganubisotuzoke.pdf
    • http://fofawuja.sanantonioguardianangels.com/uploads/1/3/0/9/130969439/nanutoxeten.pdf
    • http://lilasirut.stepschristianacademy.com/uploads/1/3/1/8/131871980/b0abbe7de2.pdf
    • http://files.crossdepot.net/uploads/1/3/1/0/131071056/8287851.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/47965569203.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/jizejafekijimawili.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/zukag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/aquacultural_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/64132548054.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/vupexudolizagenebolizewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/rebefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/gonujekufamep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/makalah_asia_tenggara.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/central_park_guillaume_musso_chomikuj.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_off00004bfd.bin
c7210f67c35b0f6b79846fa8a5128880918fa86290218e05858e462679f22b05
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFD 4984 bytes
font_01_sfnt_off00005cc0.bin
5a259a2774affaaa11779129ff29a061f5ff7ffc24f2a939190df1df1c6aaef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC0 10500 bytes