Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f9e08a73b9f751…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 14:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0ada56752479aa1dea93cb5f2b036e SHA-1: 241a8519dc9e77b03ca1271a58f9986bc49a33bb SHA-256: 60f9e08a73b9f7519376ca72934c36919b0a89543fb42b2a86c5737c829ac037
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier strongly indicated maliciousness.

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=sea+lantern+recipe
    • http://files.morethansparrows1.com/uploads/1/3/0/7/130738531/691de90e2ba087.pdf
    • http://files.chrisremitzcpa.com/uploads/1/3/0/7/130776042/xepigus_givelo.pdf
    • http://files.affordablecardssingapore.com/uploads/1/3/0/8/130814238/redarifotep_silek_teramipevo_vopunaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/564221376.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/2492810173.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/93186932115.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/895361021.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/16723654623.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/lopipope.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/35295257770.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/13255509213.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/warubexigefoxib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/22994917015.pdf
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/11180758505.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/56146244107.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_off000066b7.bin
19bde2881c73cb7fc6200e427fdaf9be682489b3ead368327b520f0bd849d815
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B7 4852 bytes
font_01_sfnt_off00007744.bin
e1d5d49e6daa50ff46a4a424036ead1cdb3bd731cbd7c82bf296b0173c8466db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 10192 bytes