Malicious PDF — malware analysis report

Static analysis result for SHA-256 075d4a6949b82b0a…

MALICIOUS

PDF

40.7 KB Created: 2020-07-30 09:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c204853676b732eb5be1ddb5f25ec0c1 SHA-1: b80f31d968662c5875735189ae22d1b933a2570f SHA-256: 075d4a6949b82b0af47232a5ea9df14a0404a2e71159d5b0a9cd58922815f912
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', which is used in conjunction with a lure related to 'Google docs pdf comments'. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution attempt.

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=google+docs+pdf+comments
    • http://files.sweetnlowdachshund.com/uploads/1/3/0/7/130739544/kobaxadidu-digorat-jemabipami.pdf
    • http://files.mosaicdownsyndrome.com/uploads/1/3/1/4/131453436/e53d23f7a.pdf
    • http://files.medfieldk8pto.com/uploads/1/3/2/7/132710592/7407f8b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/lupamezadinojepubodijosev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/69680298661.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/76263016599.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/96794222667.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/9327980981.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/nitipazufak.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/bugipawexodalorasus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/27390680146.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/sabagilusibevakonefuda.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/fazofopudutejizirarela.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/letot.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_off000063de.bin
e67c601d603f4fdcb7d45a6d3da2e5df477f9a21e360f41d002b8dd87b90f8c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 4940 bytes
font_01_sfnt_off000074a3.bin
f081836e8b0565e938c302fe5fc0645f40fdb25a07f272a56872ade1a9228c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A3 9768 bytes