Malicious PDF — malware analysis report

Static analysis result for SHA-256 38466b04d4d87e0b…

MALICIOUS

PDF

75.5 KB Created: 2020-08-30 10:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 397572f1204aefff7765022b5c29976d SHA-1: daacb9dec4ba97991640be7dd7543752f14a3627 SHA-256: 38466b04d4d87e0bc4a7a7d16fff2c35f4b9d2a920ff6913f2eae0d405be437e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=scag+5e+sorcerer, is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The file likely serves as a lure to redirect users to malicious sites.

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/wix?keyword=scag+5e+sorcerer
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/bogokepofemoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/43508115802.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/1781218002.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/976841293.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/baxibozumixi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/83710823451.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/nuwegaxovapexeguwafamusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/mumixosiwuxobavuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/fakomosod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/31507442241.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/72609031410.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/bikujorolejigupug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/72333017417.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/3499606984.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/vodijotekakijiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/5923975257.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_off0000dec2.bin
c43cb25574965ac49a5f55f97884586aadad540b42f9a600c548ce712bc3a57f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 4716 bytes
font_01_sfnt_off0000eebe.bin
07ea42f5d3163fdbf5630c896132e8d1d1a20bda9c57d46a6238fd289af868d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 10608 bytes
font_02_sfnt_off000112b1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B1 4324 bytes