Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb145afb9983f24…

MALICIOUS

PDF

46.6 KB Created: 2020-09-01 03:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e72aa98b4cbaef940c7033665439ac7 SHA-1: cb1e5969a40ca9bf94877f4c4ea23ca826094c73 SHA-256: 9cb145afb9983f24730c10f5bd41d66e6ab24642a253d6a7d6a3fd9113562b3a
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'Adobe air untuk windows xp' and the malicious URL, suggesting a lure to download potentially harmful software. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or distributing malicious content.

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.
  • 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.ru/wix?keyword=adobe+air+untuk+windows+xp
    • https://static.usrfiles.com/ugd/784815_55ad54ee6ff24f5ea427089d1576ad88.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7761434a5449a08151a7cdeeb9cc05.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_bb4c6165c5de4e0f99f45fe1a93e52bc.pdf
    • https://static.usrfiles.com/ugd/43d598_75119caeb8c94cee8658e4e2b64cd286.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_26d6703f538c47cf8ac86632ab92c1ff.pdf
    • https://static.usrfiles.com/ugd/72b0e7_afdd0b1f74fb450da49bfa45288f029f.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_c17680bff9f8461a9fab179b42bfdaf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_608f256606fc4cddb6c01466de91364c.pdf
    • https://static.usrfiles.com/ugd/87a178_10776d8b60cd48198bf2a962721bf1f1.pdf
    • https://static.usrfiles.com/ugd/e3325f_30b834b783724e29a7910e4323b450e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1945de8c2834e48916708e4aeb9e4e6.pdf
    • https://static.usrfiles.com/ugd/83b1b3_214bb8381bab415f8c71446c0b28d28e.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/3_phase_auto_transformer_connection.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/27077767978.pdf
    • https://cdn.shopify.com/s/files/1/0465/1492/9822/files/kawexedikulavonekumani.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_off000077e2.bin
ca5dbf9b8ef219968d6ffebb7880170a0a53b7f699a0297b04d44070d1725775
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 5272 bytes
font_01_sfnt_off000089f2.bin
34f589fd568ece6425253cdd451d7326b2bc22abf47b3e24f27283c02ff76512
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 10448 bytes