Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ba49cc2103c0e3…

MALICIOUS

PDF

45.3 KB Created: 2020-09-01 03:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3fa49e16f533b94dd6d601d6ad35d13 SHA-1: 0a9077a4de110f6f3480fb18cec6f6924604fa61 SHA-256: e4ba49cc2103c0e38b9b5f4ebc537a19ebf04bf1cffffcc44a017df14ef84f7f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a movie title and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware-hosting site.

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=nocturnal+animals+movie+tamil+dubbed
    • https://static.usrfiles.com/ugd/c1108c_eccb846e0606401d93f2d4651cc61adc.pdf
    • https://static.usrfiles.com/ugd/07625c_eee5dbe0be4f4b7baeddbafc67c75e4f.pdf
    • https://static.usrfiles.com/ugd/74a852_fd55ffce348a4314854869bf807ed7b7.pdf
    • https://static.usrfiles.com/ugd/ec0c41_8b39fd88e6a748cf81d73237352fc212.pdf
    • https://static.usrfiles.com/ugd/b9801a_5e9068ad6379494187d786729645c170.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32663d164b94940a19c6eeb3fa24506.pdf
    • https://static.usrfiles.com/ugd/52b593_faa341e97b9f408faad613ebf98ce0c1.pdf
    • https://static.usrfiles.com/ugd/b52961_cfac495fdff7423aa3ae6b290b120c97.pdf
    • https://static.usrfiles.com/ugd/5b9a87_f0cce01b589e42deb0bfb6155a76b955.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e2117e68b004dbc897498a972b48566.pdf
    • https://static.usrfiles.com/ugd/1cfe37_86c1a9e375f64f8c8a1f7bbfe6c6156b.pdf
    • https://static.usrfiles.com/ugd/585b1d_763f243bb7c0465d990549ccae232aea.pdf
    • https://static.usrfiles.com/ugd/b8c837_72114670a1974d5293f12dccec51f90e.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_0cbb829218454b9589d726e3a40d3ae3.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_off00007241.bin
12619edc464cc2fe6ab53fab57cf95736b231638f312ef773dea6f90114a900e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 5252 bytes
font_01_sfnt_off0000840d.bin
c6a5bc1bba4b00e3511fe539eb80dd491587949a11e9761ea6708794895b7b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 10728 bytes