Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3fc7de308f34da…

MALICIOUS

PDF

73.8 KB Created: 2020-08-30 23:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3917919f31fceafee541d96f9f7d80ff SHA-1: 13e2d2cb62296b50a6daef24ad7ad86760bef274 SHA-256: 7c3fc7de308f34dad72cba2f1ba50bbd71b4a1742b2e82b847e9a85bb528bac6
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector at 'https://ttraff.ru/wix?keyword=john+deere+1026r+owners+manual'. The document body, though heavily obfuscated, contains text suggesting it is a lure for a "John Deere 1026R owners manual". The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites.

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=john+deere+1026r+owners+manual
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/rubatetizoderulobapakik.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/49277438022.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/43411192123.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/98578428333.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/kewulasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/mario_game_over_sound.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/78969816274.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/52088643639.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/wederexag.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f2fc233092a431facb0184f681c8f3f.pdf
    • https://static.usrfiles.com/ugd/6908d7_bbf30aa3a26b456da6b957eee498899a.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_29b6a9a8978044cb8bcfb462580db116.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_off0000d61a.bin
01473b2ce9b74c8dcd3fd7df610bd0ef5e94792ff3a87af1b56cd9279bc9c160
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 5380 bytes
font_01_sfnt_off0000e836.bin
1532c5baf5a41ac2cbfb1ea5ff263074d5688a2b4f268e8d55a6609f929b8f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 10464 bytes
font_02_sfnt_off00010c05.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 4324 bytes