Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b76f376603d2328…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 08:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90cce039743a36ab02ee83763dafdee SHA-1: 241e7bb9fc07164bf26b7782228230f48a7c8b28 SHA-256: 3b76f376603d2328a88274839539379ea085d7b226a95edce0bfbe4feb1e59d1
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=sunbeam+900+watt+microwave'. This indicates an attempt to lure the user to a malicious site, likely for phishing or malware delivery. The document body, though heavily corrupted, contains fragments of product information and the malicious URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sunbeam+900+watt+microwave
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/19656576434.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/gifunetijefi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/64541057988.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/gurotamutivav.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/arcane_warrior_build.pdf
    • https://static.usrfiles.com/ugd/b56239_b9ecdbcad8844452a72b38db041341c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1f8dafe5cc4902892627a4f428c04b.pdf
    • https://static.usrfiles.com/ugd/1df9ea_c852116f39be4f05acf5b6a251a79d87.pdf
    • https://static.usrfiles.com/ugd/b910ae_ce7a88c45d094e91a04b1bc73bcf26ef.pdf
    • https://static.usrfiles.com/ugd/2c8d66_e120cd51eb864fe59c3c0355d795eb3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed2ea15a0cd4167ab7d6c4bb16740d8.pdf
    • https://static.usrfiles.com/ugd/e3325f_d00989ec83fa438fbeeb5f92da94035f.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4896/files/cambridge_certificate_of_proficiency_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/ropudik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/2014_range_rover_sport_owners_manual.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_off00005920.bin
712fc4a241c7b78882d9326785e5c78a96743f5dd4eafd2d6ea83734033867a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 5312 bytes
font_01_sfnt_off00006b21.bin
b738cb29d89acf163f57378c40c7ca8b63ea67f7612723031c4a48026a81a8d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 10216 bytes
font_02_sfnt_off00008e28.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E28 4324 bytes