Malicious PDF — malware analysis report

Static analysis result for SHA-256 db164b8c04062168…

MALICIOUS

PDF

34.2 KB Created: 2020-08-25 11:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af417fcada4f61a947a7403419f75b0 SHA-1: ce34cd58aef9a2c9438432e466c96785ed0b4441 SHA-256: db164b8c0406216835c83be8cdedc4de2cc3fc37ba1e1585597cdd41068347fc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to deliver a second-stage payload. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a phishing attempt. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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.cc/pify?keyword=dallas+injury+report+espn
    • http://files.myprocorefitness.com/uploads/1/3/1/4/131482819/dobasekejos.pdf
    • http://fokubid.pasanity.com/uploads/1/3/0/8/130874633/watiro-raditinoguro-dajotiz-gonupipusowofe.pdf
    • http://dogerur.sportchatteris.com/uploads/1/3/1/6/131606069/622702829.pdf
    • http://riwapivak.quietlegend.com/uploads/1/3/0/9/130969723/7028861.pdf
    • http://files.kristenkellymahoney.com/uploads/1/3/2/7/132740533/1384295.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/21201964018.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/benim_hocam_geometri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/puziropuxokoges.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/orthographic_projection_sectional_view.pdf
    • https://cdn.shopify.com/s/files/1/0438/4142/1472/files/xonewanosozolagiwo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/xaxexigasuwaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/73333257011.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/tuvulus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/50667732196.pdf
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/lolerujinemeniwivimitipip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/15267979250.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_off00004946.bin
56ce920a9d384d3837697e4e5b8054933f8d9483480a803162850c2cd58cecc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4946 4988 bytes
font_01_sfnt_off00005a57.bin
c129719c0c9880c90016076d31aeb8c68455b979e9c97d1e45a13e7c50e9ae57
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A57 9816 bytes