Malicious PDF — malware analysis report

Static analysis result for SHA-256 8109d651005579a0…

MALICIOUS

PDF

35.6 KB Created: 2020-09-04 12:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 033c02d38647c5501665caca127f99b0 SHA-1: 2d176631aec39ab47f5ada8fea6b564a269be77b SHA-256: 8109d651005579a07d748bafcaf2db822ec470f1e1a1f4296548267d222e1e16
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports a phishing or scam attack pattern.

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.club/wix?keyword=flight+of+the+bumblebee+saxophone+sheet+music 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_d432e32bd3b54e0988582ef2b3f4adce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/696117_ccea2f1ad44a4e9c80bab0a4b48f04bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c1554_be5ed3bd278f49739d0d9d185e6b61e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f523c3_0b3000c3331c4f3fb406b490c4b86c48.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/8278798081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/biology_of_gila_monsters_and_beaded_lizards.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2947135ea2b241ec82552138cf8ab89a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/23924c_f8380a17d69a4efa902938a18fe493d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a107db_178e55cd78954006936b4495d7dd69c4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/duxavefoluweduxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/72514123289.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_off00004c30.bin
bb5fb7803a15c121ef467307d54ce19e3c98f88f7a21b5b0b43f323ac2a61bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C30 5496 bytes
font_01_sfnt_off00005eca.bin
946c7b423d12ebae6c2a9264d9615419605a9b115008ba04b835569a28694cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 10128 bytes

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