Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e277a697899ccc2…

MALICIOUS

PDF

41.6 KB Created: 2020-09-12 03:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbd4ade92ced5dcb26e24f3c48e0f9c SHA-1: 9327e6f47d862addcffe6e26dac206dbeeaff1eb SHA-256: 8e277a697899ccc2a34ee42eb50ed8cbe75918e4dadfa9ecf75e5f733e82bd1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=plus+size+formal+wear+melbourne+cbd', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify URLs, likely as a tactic to improve search engine ranking for the malicious link.

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=plus+size+formal+wear+melbourne+cbd
    • https://cdn.shopify.com/s/files/1/0433/7372/3811/files/43166121167.pdf
    • https://cdn.shopify.com/s/files/1/0448/3996/0737/files/zekokegemobugaturefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/wozotumeneb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/boxojogu.pdf
    • https://cdn.shopify.com/s/files/1/0460/0132/4193/files/crusaders_of_light_scout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/88230231385.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/2865088723.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/nemelijekabisume.pdf
    • https://static.usrfiles.com/ugd/529dbf_db1837e2b77c40d39d966d6da79ed7bd.pdf
    • https://static.usrfiles.com/ugd/136d3d_3bff6b0c3aea45c8928fb150e7034915.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d956ce77f8b44fa80c665f0e1b82399.pdf
    • https://static.usrfiles.com/ugd/f0f215_7d6686d3d4e04a4ebf690382397f4a17.pdf
    • https://static.usrfiles.com/ugd/405339_8f4e8f5db7524a5a87690c35f6c7d937.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006546.bin
95d5fd5e0150f8673d54a2f93f4a88101436f0603a91ade1208197d5683dc493
pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 5448 bytes
font_01_sfnt_off000077ce.bin
7c45e4453f234fe3fc3e4954c872b3cded3a694de998ef32ddb06e4f5915a29d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 9968 bytes