Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3dbae0c217efe5…

MALICIOUS

PDF

43.4 KB Created: 2020-08-05 07:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c98de9ed2313f6040f42a38c92adafe SHA-1: 6b553dec7732476045abd24caac62f0810f84bf9 SHA-256: 0a3dbae0c217efe57d9af25a872c6111d54d2b98dad79b42b7b95c58efd8fb87
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious 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.ru/pify?keyword=test+de+coombs+directo+pdf
    • http://files.anandayogawithkaren.com.au/uploads/1/3/2/6/132695525/rojejuvulutipowoxef.pdf
    • http://files.jonathan-schork-studios.com/uploads/1/3/1/4/131409761/ebd299876282e.pdf
    • http://files.alliancetoendtargeting.org/uploads/1/3/2/6/132696465/dezegebet_nalad_naxagimepitem.pdf
    • http://files.theopinionatedone.com/uploads/1/3/1/8/131856290/d6b037b2526.pdf
    • http://files.schoolofwong.com/uploads/1/3/1/4/131453247/2892625.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/13728737159.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/dudopibepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/raspberry_pi_remote_gpio.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/27021539134.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/zemivagolox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/79158953438.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/71677897565.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/34863361266.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/rajamilutowekemepipal.pdf
    • https://cdn.shopify.com/s/files/1/0435/5257/1555/files/pokod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/48839730420.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/83046082967.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/61644448132.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_off00006ae7.bin
6c50588009cd5bae417a293153fca41b91f9baeb2a4f3c1a956cca4ac8916870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE7 5148 bytes
font_01_sfnt_off00007c49.bin
95cffabf54fea7138d23c55fc350f02146813633c2e200f7ca5885392dd84f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C49 10512 bytes

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