Malicious PDF — malware analysis report

Static analysis result for SHA-256 148aec493031f5a2…

MALICIOUS

PDF

40.6 KB Created: 2020-08-17 17:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ca0219c86eac1efb7f6e825d76fc278 SHA-1: 450c41f8538d580ab7b520cb805421f1ce2cc409 SHA-256: 148aec493031f5a2947c04b37f3ff3e7276c83429b4bb92ef9c15cee5e455689
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially corrupted, includes this URL and other Shopify links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to a malicious URL, likely for phishing or further malware delivery.

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=optc+doffy+v2+guide
    • http://tijojoxur.smokyriversporthorses.com/uploads/1/3/1/3/131379759/53c65e52ac931.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/retokimexiwuveres.pdf
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/tybcom_syllabus_mumbai_university_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/jepuboxafukedegoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/kixumapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5502/1223/files/55751200735.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/alan_turing_the_enigma_by_andrew_hodges.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/39523103262.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/suwonole.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_off00005fa8.bin
90e4082651d5d9d7c060fde3921338e812a42310cd8fb1604f39acec58a8c650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA8 5128 bytes
font_01_sfnt_off0000714a.bin
e5204f0970bf8320009d102083caf144949958387c8af704b61682ac67b86865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 10868 bytes

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