Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29d375d38afc676…

MALICIOUS

PDF

44.6 KB Created: 2020-08-26 09:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1439fe41f1331ae2971c0698d0fe244 SHA-1: 9078ac3375a3640e8fb6e8a8d9705cfdfd999c56 SHA-256: d29d375d38afc67608720a8f906c312d679404ee1cf043550dc303730249aadc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is likely part of a phishing or scam campaign. Additionally, it features a large number of embedded links to other PDFs hosted on Shopify, indicating a link farm strategy. 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.ru/pify?keyword=the+human+centipede+full+movie++hd
    • http://files.clarachanmusic.com/uploads/1/3/1/4/131408103/wamefopo.pdf
    • http://files.smartzonekidsclub.com/uploads/1/3/1/6/131606211/453010.pdf
    • http://files.katie-berger.com/uploads/1/3/1/6/131637190/e52816620e2.pdf
    • http://gegitis.ericgrayjohnson.com/uploads/1/3/2/6/132682347/d717a5b5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/lafurexapesakola.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/emerging_enterprise_network_applications.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/ventajas_y_desventajas_de_auditoria_interna_y_externa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/defodufavitazivupojifefev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/gegegobop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/nitexiveki.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/15701486641.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/zavekubokuzojekimadowin.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/bexapamavezivamupavemide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/larom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/kegevebifeb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005329.bin
4554de4091b67e732af8b1f96c0c28c67c5a5eb62a8ef43c094ae89f394c4b36
pdf-font-stream PDF embedded font (sfnt) at offset 0x5329 5128 bytes
font_01_sfnt_off00006487.bin
0d72860c1470892345c73a0fdcd3e7bea2e8e98fa2b7f4ae9069025f72606b1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 13048 bytes
font_02_sfnt_off00008e71.bin
cbc26c54e3bf740f65d36bf13b37b5c31c238b7e0a6706b5398790d53f54be46
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E71 16124 bytes