Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2334c10d1c8cb8…

MALICIOUS

PDF

54.7 KB Created: 2020-08-29 19:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f813b4ee66de8e2f30eb5253515c9d SHA-1: 2b5453fe47a9551c09994e4e164427a47fa30854 SHA-256: aa2334c10d1c8cb854d58849c9c7dbc48a9de009391147e61a63b7d06cd0d705
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to 'https://ttraff.cc/wix?keyword=satan+s+bluetooth+stack+installer'. This indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'bluetooth stack installer' and the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=satan+s+bluetooth+stack+installer
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/fixed_budget_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/discord_center_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6202/files/noaa_severe_weather_storm_reports.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/42102393092.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/590778_218c2b1c511245a881319f8f9ce5d373.pdf
    • https://static.usrfiles.com/ugd/3b47cb_4ce63f91d36b4e2196a1b48d164cd874.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a6ac33b1af34a1f9dab9e5e29e42d36.pdf
    • https://static.usrfiles.com/ugd/b8c837_151d0201c8e44307b452a5ebf81ff981.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c9e79d1581144c1ba5652b781978cfe.pdf
    • https://static.usrfiles.com/ugd/f0f215_794dc8a83c6f4825b943dcacc9b4f94b.pdf
    • https://static.usrfiles.com/ugd/0049ca_5881dbefbf2e4247bcc3dc83e43e020f.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_off000086d7.bin
5863f61e5138b211e988cc284b18de70c9b442c0fecded8ce207d6a26dba0aea
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 5076 bytes
font_01_sfnt_off000097fc.bin
a1aa92d48eb85ccf9bac6b3ec864aa704a1e07111699c5cd8665caca73397f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x97FC 12356 bytes
font_02_sfnt_off0000c01c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC01C 4324 bytes