Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5a34f4e1e77d23…

MALICIOUS

PDF

57.6 KB Created: 2020-08-31 12:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0a1e57245f26a34041640b9acae45a SHA-1: 57186b088ef2995524f07f0efdacf2149c52fd29 SHA-256: af5a34f4e1e77d23b3344f556c911ae258b3c1b8a7f01a8418cce5ec87aae948
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure to click on these links. The primary malicious URL identified is ttraff.ru, which redirects to further content. No scripts were extracted, limiting the analysis of the payload.

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=willmington+guide+to+the+bible
    • https://static.usrfiles.com/ugd/b8c837_3cba53c8fb9c404482634ad67dad745b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da2dc5df60c4aa28a00aed2239a116b.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_839482f38b154b969741fca1ccee7d01.pdf
    • https://static.usrfiles.com/ugd/f967ac_fc3859a528f840af92c4e6b0ccb30ab9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1d29028b024ba9be7eda52858064b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_edbf9d3e982a4cc5be79995981a2a573.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f415b5d794238838a0d95b049f254.pdf
    • https://static.usrfiles.com/ugd/6cf392_e4f32f47339c4d2fbc98e6d49f44ae6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f454f3447d4a4f27ac240a43d40afa8a.pdf
    • https://static.usrfiles.com/ugd/a467d2_7c0fa48bb46a45a2a1f92d966a0bedd9.pdf
    • https://static.usrfiles.com/ugd/0d002d_e0d1de23f5bf44c4b4a797dcb803dc96.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f8db4302e5f4fa99060525ba0e440dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bddf7b4514c247c1be2646bd05302187.pdf
    • https://static.usrfiles.com/ugd/b8c837_441e3a808b99455dab9bd83af84f3a4f.pdf
    • https://static.usrfiles.com/ugd/c63dba_2048dec00db84d6bb08ede32d2d782b8.pdf
    • https://static.usrfiles.com/ugd/0dd040_36ff8c2aba4943afa3af44da6e970074.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fcd.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCD 2828 bytes
font_01_sfnt_off000089c8.bin
a4ade9eb9574b9ff228519e016352df1fdb3299fd69c531408effecf35fcf5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 4908 bytes
font_02_sfnt_off00009a60.bin
f0aa63a912951ad72aad0e7bbff02979c4bceda7084f4732d3c1e00c403cb8b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A60 9868 bytes
font_03_sfnt_off0000bc5c.bin
082ba75f8f43d1426b6f44c8371e483f90c10fc74709c9ac0a7609c6a8ce476d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5C 17588 bytes

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