Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea091d297cd935c…

MALICIOUS

PDF

48.2 KB Created: 2020-08-30 10:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d34ecd1af137509fdacf2abd0d9f01b2 SHA-1: 7f6f75dec09e51de27fa677705f51a9618221c81 SHA-256: dea091d297cd935c57b57faf5566b4f99c80ae917c83337c476ef577a75be053
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.ru, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of numerous links to static.usrfiles.com, while individually benign, contributes to a link farm pattern, potentially for SEO manipulation or to obscure the primary malicious destination. No scripts were extracted from this sample.

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.ru/wix?keyword=metallica+garage+inc.+songs
    • https://static.usrfiles.com/ugd/3e87bf_3967d025cf1f4b5b90da8dfee3eead97.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_604106603eb34188b03524f81f934c1b.pdf
    • https://static.usrfiles.com/ugd/89c6ad_8c5efb61beb54b57b1f4e85a4cd62e5a.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_bff91dc397664208b6fe0ef3a5fc4004.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bec7f00dfa645c18488ffa75b96729d.pdf
    • https://static.usrfiles.com/ugd/5438e3_4dba9355d51b4fc1a6901b12d846a93c.pdf
    • https://static.usrfiles.com/ugd/e4ff69_3c07fc027afa4c5695edd0275e9ef535.pdf
    • https://static.usrfiles.com/ugd/accd1f_c77413ce4b574c31955e4b4e2c0cbc45.pdf
    • https://static.usrfiles.com/ugd/b8c837_20d82a16a88e4f5791e57b7def2b1a52.pdf
    • https://static.usrfiles.com/ugd/b8c837_4364b02b69644331862740040b39d5e2.pdf
    • https://static.usrfiles.com/ugd/d2751c_b38b56d60ebe4087b8ccdfea6d6d1a77.pdf
    • https://static.usrfiles.com/ugd/b8c837_71579a2e973a4942a47c4e245a47f217.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/stay_alive_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/goanimate_comedy_world_creator.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_off00007404.bin
89bf2440a3799f0c7874eb888d908f3ebadaac20b6929f22ffba58ce0c364d52
pdf-font-stream PDF embedded font (sfnt) at offset 0x7404 5004 bytes
font_01_sfnt_off00008521.bin
e777fc2d65902aaee736f44c1455fc6244291bd65ec35438e4d073b409276a17
pdf-font-stream PDF embedded font (sfnt) at offset 0x8521 15172 bytes