Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbd08f5f5663a8b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-15 03:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4c1aedd43408c4ceecee5dfdd69188c SHA-1: 7085f3c3411dd5c4cd592c8b91bc510f502f85a0 SHA-256: 3fbd08f5f5663a8b58c5ab17d15613d4397524743e9d951b77dfa3547eccc620
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, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary URLs, 'https://ttraff.com/pify?keyword=factual+report+text', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other PDF links hosted on Shopify, suggesting a coordinated effort to distribute malicious content or redirect users to harmful sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=factual+report+text
    • http://files.annalisalosangeles.com/uploads/1/3/1/0/131070591/wijemepo.pdf
    • http://files.thomashechtpiano.com/uploads/1/3/0/8/130813904/1530544.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/dorafiduzipuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/kiwegonexokikajetam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/fawovemexokagetibozaxur.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/toxekigagudobesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/petavemutav.pdf
    • https://cdn.shopify.com/s/files/1/0427/4195/6775/files/kokulalarogekus.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/81368561294.pdf
    • https://cdn.shopify.com/s/files/1/0438/8929/5515/files/21777534091.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_off00006f1f.bin
6def01362cc3bf54b49679bc7e7beb7e2dedeaa0123959139b042727bf5ef505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 4772 bytes
font_01_sfnt_off00007f67.bin
b714e197809cc2752b880cb2176ede79dc0befe673058ade0101e5fdfa03173b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F67 9912 bytes

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