Malicious PDF — malware analysis report

Static analysis result for SHA-256 60909ca7b52a7288…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 07:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91bd4a29b0b3acfd48f0362393f9f197 SHA-1: 72df5432faf9730b3a92d64fdacfa050326709c3 SHA-256: 60909ca7b52a7288df2e66e6579d0c385aae5b756ca3ec98cdd8a2fec27fbc6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document also contains a large number of embedded links, many of which point to benign Shopify URLs, but the primary redirector is a strong indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to direct users to malicious content or phishing pages.

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/wix?keyword=ph+definicion+arquitectura
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/nugitimorikuvorume.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1480/files/precalculus_mathematics_for_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0465/0657/3982/files/mona_cartoon_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/finopogaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/gc_calibration.pdf
    • https://cdn.shopify.com/s/files/1/0436/2695/4905/files/vufesup.pdf
    • https://static.usrfiles.com/ugd/8ba634_2972ce28991c4a5581080aca414d2417.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_bcefd334b92e4ad5a5790479d1d9020c.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/kumasemotenazeworekeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/81880630557.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000597a.bin
7460a97e525d0e053391de50f19258bcf9158f4639028f51136ea41a8b916c0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x597A 4908 bytes
font_01_sfnt_off00006a11.bin
250481ae3f49ff24999f6c929a6bfcb2f70bffb589a841ef4f96ee89c8f1b683
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A11 10880 bytes
font_02_sfnt_off00008de1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 4324 bytes