Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a700f2ad8245c5…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 14:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140bbc731706aeea8f8924817d7e6a48 SHA-1: b1ec3eceae9ee506d2753051e3d938dc4ecebd6c SHA-256: f4a700f2ad8245c5835431663edc260d8a9ddf8edd5e9c3d0d439685c32be7c6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to Christmas card templates, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation. The primary malicious URL is 'https://ttraff.com/pify?keyword=christmas+card+templates+for+cricut', which is designed to redirect users to further malicious content.

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=christmas+card+templates+for+cricut
    • http://files.freedomballoonfest.com/uploads/1/3/1/4/131438313/meliterubaju-zubegusotosibap-bajiwiwuxoguw-gevuboxugut.pdf
    • http://files.redondo-events.com/uploads/1/3/1/4/131454219/4281204.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/yamata_sewing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/63173983250.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/gta_5_report_griefing.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/kadurevupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/alopurinol_300_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/analisis_del_genero_lirico.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/laxizig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/30438329601.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/xepajagepof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/7484271788.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_off00006624.bin
8ab44eb2800bb7b6a713e8139f1a296dcef867fe62e3a3ac0a585fcfb2ad1760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 5300 bytes
font_01_sfnt_off000077ff.bin
34102a7e43c3df0c8d56674a0e5b63cbdfe3185e72a458c6257a1504281e7697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FF 10088 bytes
font_02_sfnt_off00009ab4.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB4 16312 bytes

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