Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43e1314481f252a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-29 15:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1787a6526f8e63a84b8237ca1799a3f SHA-1: 794ecdcc8d528e7dc1fb3784f0a0adebb808283c SHA-256: a43e1314481f252a1024efa8187aa533f293443632f6de5bcf77dc43a6ab4d03
170 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is associated with malicious activity. It also features a link farm with numerous PDFs hosted on 'static.usrfiles.com', suggesting an attempt to manipulate search engine results or distribute content. The presence of a 'password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass security scanners. The document body, though heavily obfuscated, contains the malicious URL and references to 'Pes 13 indir torrentle', indicating a lure for pirated software.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pes+13+indir+torrentle
    • https://static.usrfiles.com/ugd/b8c837_e29708be502f42099aadc15b0e736f8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_33577a52336a415ea93165f1e69288e7.pdf
    • https://static.usrfiles.com/ugd/f515ca_76b0faeca560422181e91006c8079196.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35fb6a39cb8468c8763266c8cb25d04.pdf
    • https://static.usrfiles.com/ugd/b8c837_c943bdc124c843179d3216b1687378f1.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/39274975311.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/34055760091.pdf
    • https://cdn.shopify.com/s/files/1/0430/9680/1434/files/22334424317.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/zafokebewazokawobowuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/overboard_2018_parent_guide.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_off000060ad.bin
6670aecc7bb24dedf7a16c06cc1180a0e4aab054061c6b2f0469710640b98e93
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 4616 bytes
font_01_sfnt_off0000705f.bin
0d8985fdec25012953ca3c47846940fa976f4c80639e9801b7094987187a1d02
pdf-font-stream PDF embedded font (sfnt) at offset 0x705F 10856 bytes
font_02_sfnt_off00009589.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9589 4324 bytes