Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a19934160cdf6…

MALICIOUS

PDF

30.0 KB Created: 2020-08-24 21:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 984cbad2492e86cf960ae46e334977c6 SHA-1: 7a6134a02ec91fdb1b7f41aa6f68dfa316246d52 SHA-256: 876a19934160cdf602af426be629d30c9feae6d39c75c2aca40498161ea0af58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, however, directs to a known malicious redirector infrastructure at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content, likely for malware distribution or phishing. No scripts were extracted, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=not+about+angels+cello+sheet+music
    • http://fojilexuz.cappuccinoandcompany.com/uploads/1/3/1/4/131452988/zutevovozuberome.pdf
    • http://kudakapib.edinahistoricalsociety.org/uploads/1/3/0/8/130874359/552625.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/55208113323.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/activity_book_11.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/zorivomifepekobomi.pdf
    • https://cdn.shopify.com/s/files/1/0463/2487/5419/files/flight_of_the_bumblebee_cello.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/enable_dns_in_outbound_rules_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9645/4808/files/mimuweregegikopapip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/76517202208.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/nubuwitudamimoxirapeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/1327844183.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_off00003bdc.bin
5f6d33c8101a60f6d8ce0c0e3d1607cb1b969e33631402e9616bd20897d7c46a
pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDC 5228 bytes
font_01_sfnt_off00004d82.bin
b9306ea1d13b604ab5b46b43608e0b743c3dc0149d8f07b7f064f7a7d3e1c3b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D82 8804 bytes