Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2adfc6bb0fdddb…

MALICIOUS

PDF

44.1 KB Created: 2020-08-03 16:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82bab60d16445404e4d755160131dd5 SHA-1: 55069c5f1f8489136e941e996fc6480e4bd95753 SHA-256: 9d2adfc6bb0fdddb4fcbdc46bc0edb6e969f4e2043064c9f1384688cf08c74cd
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Aprendiz de brujo pdf gratis' and the malicious URL, suggesting a lure for free content that ultimately leads to malicious infrastructure. 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=aprendiz+de+brujo+pdf+gratis
    • http://files.jeetvirks.com/uploads/1/3/0/7/130739369/ronuwogaz_jolusoku_pitezag_poxidapibuve.pdf
    • http://files.cohorun.com/uploads/1/3/2/6/132681325/3d2d02ef93.pdf
    • http://files.petsinneedsociety.org/uploads/1/3/1/6/131636772/7609336.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/zepomobuwoduli.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8176/files/34093796286.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/betawedodanak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/sutadaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/nazepapagawulamifini.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/gesozeteninirozak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/for_each_java.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/94393511136.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/gajutaxaxapofuvotogika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/14043442874.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/83350478715.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/segoe_ui_font.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/95264590749.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b2d.bin
f190f4d5d9cf24f920ba05b48969dc2db33b8c7b3d72eedd85ae7571135a1b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 5432 bytes
font_01_sfnt_off00007dc3.bin
edc1ab5efbb68bc1869f5abb240a302b951465567d5c60944b842beedec5deab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC3 11000 bytes