Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5707edb0eaa050f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 03:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 364d817043d1c58f966c2cd6cde27f8b SHA-1: c2eddb0b7ce12491bc3aeb680fbff959612acfc5 SHA-256: a5707edb0eaa050f8fc0a76e00be4c94b00885c59c13ec6bf238def5a6f0dbec
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious sites. The document body and embedded links suggest a tactic of creating a link farm, likely to improve SEO for malicious content or to distribute malware. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious links.

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=setting+healthy+boundaries+in+relationships+pdf
    • http://files.birdhouserow.com/uploads/1/3/1/1/131164202/c1a8824592b5363.pdf
    • http://files.centralvetimaging.com/uploads/1/3/0/7/130739343/fikupimego.pdf
    • http://files.aromaremedialmassage.com/uploads/1/3/0/7/130775292/9103105.pdf
    • http://pazizape.maytreearch.com/uploads/1/3/1/4/131453060/taxekojumalutefaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/vopikuwubixokupedokodu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/69085258465.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/vawazogafadivezepon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/college_physics_a_strategic_approach.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/cadena_de_valor_de_una_empresa_minera.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/jedubabupomenijagoneloj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/menozuliselik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/39949580237.pdf
    • https://cdn.shopify.com/s/files/1/0440/3625/9990/files/hanna_arendt_a_condio_humana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/32492801801.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/jivufulejotesawi.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_off000073a9.bin
7f64b992025945a3089b4219e81cd278f0db8257ba8a2d933415ca2e75d97609
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A9 5648 bytes
font_01_sfnt_off000086d7.bin
29f8bf379d080193cdf4e7278ea16d8c428f46a7bd319e17c3eed63bdaf09169
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 10280 bytes