Malicious PDF — malware analysis report

Static analysis result for SHA-256 b268cb0fd9c57031…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 09:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f8fde162783b9bb90d4d862c7569c5 SHA-1: 25faff4b14b7b0e3342af16c0b31776e8a1b8fb1 SHA-256: b268cb0fd9c57031bcd7c5da9c56a992f43e113f5fd7a1cb51bbacfe819602d5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF was flagged as malicious due to containing a large number of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the embedded URLs, https://ttraff.me/wix?keyword=research+progress+report+sample, is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify links.

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.me/wix?keyword=research+progress+report+sample
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/34965737300.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/bodybuilding_tips_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/mizadanaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9021/files/sri_yantra_hd_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0448/0316/2263/files/exothermic_and_endothermic_reactions_worksheet_answers.pdf
    • https://static.usrfiles.com/ugd/5af86b_3ba1a667542b40bc97ae96d172d3da28.pdf
    • https://static.usrfiles.com/ugd/221f3a_d57777eb446341748b8ff13ddaef18f5.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/95138903173.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/forgotten_realms_campaign_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/beliefs_of_jainism.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/najabimelegelokawuxedajot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/zoxavodopetoxevisupebe.pdf
    • https://cdn.shopify.com/s/files/1/0441/1562/4088/files/632_363_ignitor.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/new_balance_cricket_shirt_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/30525912749.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/duluvavapodojawufasepux.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_off0000675b.bin
c4e6d9d13029b1fa457bee680eb4622358095c533768788d64f2ed8156751a26
pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 5352 bytes
font_01_sfnt_off0000796e.bin
a1330f53580267d61111a4060d43961f6311b677d812f85a7233bec672765fdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 10024 bytes