Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5faa00295395b35…

MALICIOUS

PDF

46.2 KB Created: 2020-08-06 08:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad69c43da12cfd35a2626215e925274 SHA-1: 640df540ca2d429ab8eab9b2c6a098fa5d2d14d5 SHA-256: d5faa00295395b35797dbb6acfd137724786632eaaf5fac226dae945cb072b9a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure (ttraff.cc). This suggests a link farm or redirection attack designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=alimentos+agroecologicos+pdf
    • http://files.brightsideupcartoons.com/uploads/1/3/1/4/131438539/0cb00989d331.pdf
    • http://files.gdni.biz/uploads/1/3/0/9/130969944/20b957aa54667.pdf
    • http://files.barnhille4e.com/uploads/1/3/1/4/131411688/627416.pdf
    • http://files.rebeccajaynephotography.com/uploads/1/3/0/7/130739450/lusipaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/98545772634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/kofaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/53100060857.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/business_success_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1472/files/dreamweaver_tutorial_for_beginners_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30549310566.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/25018110293.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/xiwajofes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/1223502701.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/lewaburonubidasinerabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/dedazazibuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/37782997116.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/cassava_flour_processing.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/technical_analysis_forex.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_off00007634.bin
8c43d5acd765d6cfe33f4bd30d111317e387a4740ff1e9e19be5e377a1d699e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7634 5464 bytes
font_01_sfnt_off000088af.bin
214e7c56a8951f6b8a3b1861912f5497ab9d8b4e89e63f39d170b0a82bb87011
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AF 10552 bytes