Malicious PDF — malware analysis report

Static analysis result for SHA-256 faecf41e829390b3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 19:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf448c8807765d2b475cb91ada916ffd SHA-1: 66bf00fdc46d9a360a7b56c44f2b50a72faaf6f6 SHA-256: faecf41e829390b35462c17774bbbbd9d28817cad46f94f02be77988dc79d7f8
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 `ttraff.com`, a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The ML classifier also 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=waste+management+pdf+philippines
    • http://files.amandaghahremani.com/uploads/1/3/1/4/131438111/2306855.pdf
    • http://files.turlocktransit.com/uploads/1/3/1/4/131406732/6218c.pdf
    • http://xivivepif.awavearoundtheworld.com/uploads/1/3/1/1/131164250/1775773.pdf
    • http://files.roots-and-wings-academy.com/uploads/1/3/0/7/130740211/wiwibaj.pdf
    • http://files.coronavirusreportcard.ca/uploads/1/3/1/6/131606169/5402135a593b19d.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/56305632553.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/aloke_dutta_semiconductor_devices_and_circuits.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/zakodiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/atualidades_maio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/wemitagoliduzijorivipumat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/mirror_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/risunoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/xeratezek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/wazupiwunibefapadem.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_off0000638f.bin
9e797355e0b754b6df4f2c292a5c4be71a4447508440ab220c28de58dd951cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 5372 bytes
font_01_sfnt_off000075b6.bin
8c37286a0de89fdc8f76a9f3d6fdb6eafa51f0ef7a1f830f6b579c72c8136cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10192 bytes