Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3aaf99466e474d…

MALICIOUS

PDF

66.0 KB Created: 2020-08-30 03:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33de05c0cb764c2c40dba7efb0347ccf SHA-1: 5f1412b7223e6a94a40a1356b159395baefbed50 SHA-256: bb3aaf99466e474ddd88bff0fc0bdb581b61af9e4e42ea5df1fb4873ef8f5de2
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to "ttraff.me", which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL and text related to a 'Crusader build darkest dungeon', suggesting a lure for a scam or phishing campaign. The presence of numerous embedded links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to obscure the malicious destination.

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.me/wix?keyword=crusader+build+darkest+dungeon
    • https://static.usrfiles.com/ugd/b8c837_ca90cdc4ee4248cb9a02fae74eff77a1.pdf
    • https://static.usrfiles.com/ugd/0df15e_e5c4ed32a608462fb6b22159c2643111.pdf
    • https://static.usrfiles.com/ugd/24853a_e2417d464e4642ffbfd7e5eac63c76a9.pdf
    • https://static.usrfiles.com/ugd/4f270c_453c0fa804384ce583bfee2e4375d648.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0b63bac26bf4b85856eaaa80428c009.pdf
    • https://static.usrfiles.com/ugd/accd1f_893b9d54f54949fab597fd1e8fda42f8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/rikumudewumelufixijisawof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/jokabufufatumamulopukas.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/ff12_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/35122012235.pdf
    • https://static.usrfiles.com/ugd/b8c837_b02aa0ade46f4f23bf2127895aa77f3b.pdf
    • https://static.usrfiles.com/ugd/ea2f88_e4052ca879494891ab864826610f0bbf.pdf
    • https://static.usrfiles.com/ugd/4dd980_da9030114d704039bb0a58a4a5b1d1d0.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_off0000c5bc.bin
7f6d6f7c584012b9855cc4fba61add2fb332a18cb1ee938c7c9aee46e4f45261
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 5100 bytes
font_01_sfnt_off0000d717.bin
c40d69d811136beea8809f49e0cb6ec25bce2ecc3bb2d32ff73def4561017bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 10588 bytes