Malicious PDF — malware analysis report

Static analysis result for SHA-256 16121509c4bee8b6…

MALICIOUS

PDF

50.3 KB Created: 2020-07-29 23:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ae4ca45328fa300dfcba816d3c86c1 SHA-1: e52cff4977c5c5c746a2dd69105f333af3bba624 SHA-256: 16121509c4bee8b63b94f40a7c1bf7e0d9446bf2b1eef152b6086a070b322a21
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded external links, indicating a link farm strategy for SEO manipulation. One of the primary links directs to a known malicious redirector. While no scripts were extracted, the structure and link farm suggest an attempt to lure users to malicious websites, likely as part of a phishing or spam campaign.

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=rural+marketing+strategies+of+amul+pdf
    • http://files.rowanfirstyearwriting.com/uploads/1/3/0/7/130739379/vedumilagex_wexifegaki_tafawufinujixa_danoxedafog.pdf
    • http://files.wamindaworkingstockdogs.net/uploads/1/3/1/4/131414134/8073049.pdf
    • http://files.eldersdailymeditations.com/uploads/1/3/0/7/130776828/faxebatebevetami.pdf
    • http://files.aimeelora.com/uploads/1/3/1/4/131453215/silubenerawisofeban.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/51736892915.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/71066192146.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/gaxebeviz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/wanotobopajituvemof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/86364119429.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/14077018738.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/sodelekoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/gimugime.pdf
    • https://cdn.shopify.com/s/files/1/0438/6075/4582/files/fajofunufosavoboxenazule.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/pinijozovisuxaruvavozope.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_off00008598.bin
7a5e7d44f45bd1b4777edd69a702438a3dd7d4018ee59a302b67e6c9e763844f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 5312 bytes
font_01_sfnt_off00009794.bin
b23137a7dcbf41d6bce907c4eff87ebe3e4e3888725d0cc84a6db608f4dc3c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9794 10768 bytes

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