Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a444db239816fa…

MALICIOUS

PDF

41.7 KB Created: 2020-09-17 18:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ac88806a8377bf158cbb1144ba4f75 SHA-1: 5a8a61c6d84ce33715d2cc7d6a044825aafc85a9 SHA-256: 22a444db239816fa6e3eec78a3337f63e6e4b29c3823835422fe584c29f5ecc6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=lexen+manual+juicer'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs, suggesting a potential SEO poisoning or content stuffing tactic. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements indicates a likely attempt to lure users to malicious infrastructure.

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.me/wix?keyword=lexen+manual+juicer
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/promissory_note_payable_on_demand_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/20926673852.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/62262701172.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/7845716220.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/denixiwifanomivoxememis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/rectifier_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/98410486081.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/91771509263.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/the_ripple_effect_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/53168468252.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/bamugokopulilimeza.pdf
    • https://cdn.shopify.com/s/files/1/0488/1062/3141/files/duxizisapubaxufumevan.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_off0000664b.bin
2b434e8a63232d679a95862fa4f6117967595afd3722b9d95b8ff9631ee1434f
pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 4852 bytes
font_01_sfnt_off000076bd.bin
5ae6b80e3aaf7c2dbf8759e433c664f19364d5598e68a2a6f2039eed9a243826
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 10444 bytes