Malicious PDF — malware analysis report

Static analysis result for SHA-256 677d01c2e37770a3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 21:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4227eb3680bb72b48fbfdd7b7c87b7a9 SHA-1: de8b43d9e74467661042ba41f7f5988cec1e86d2 SHA-256: 677d01c2e37770a3d9a7177e4595d6272008faa9625f7a1c3c39a587928b0992
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'Bi weekly money challenge', suggesting a phishing or scam lure. The presence of numerous external links, many pointing to benign content, alongside the malicious redirector, indicates a link farm or redirection strategy to obscure the final malicious destination.

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=bi+weekly+money+challenge In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/df73ab_1f76e7a0659d4f938ee593c09f21b396.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/36f25b_cb8b9878b7614b9f9592a4c25c982ade.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_31301d09ce16491a85013ce73f17303e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db1da1_667824d981364b5197642b427d23322c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3f47abcdb9904945a9c1c2bf44638d6d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c8c6c_187eec046f2a4294a8d15ec06998e1f4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonixalekena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/vodapazufokukovuruxeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/lateral_medullary_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/86222468351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/26351591081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/15202080403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/dimimomaxidolop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/duxiderarawemanekudebo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF9 5244 bytes
SHA-256: 4d893cdcfc22eaaa4cb1605f3e087f25b2c2ecfe7338046f981d6bb3e9f2964a
font_01_sfnt_off00007cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC0 10640 bytes
SHA-256: 5713f81ef2b7b74a64b9a0b8876d79c91b28918d4f6cf209e3ac5d1ff89cc8bd

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