Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d98b32c0637fd26…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 11:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c65fc6fb55836e3027d981433e2b2af SHA-1: d54952e72461ea0628940b9557d9b92ad40c0157 SHA-256: 1d98b32c0637fd26ae2c25cadec15bf3ba2062740a06434cd3aac9ed327d743d
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to known malicious redirector infrastructure. The document body text, though partially corrupted, suggests a lure related to 'Attendance management system in php pdf'. The presence of a 'Password-protected archive lure' heuristic indicates that this PDF is likely a stepping stone to delivering a password-protected payload, which is a common tactic for evading gateway security.

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.
  • 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
  • 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.cc/pify?keyword=attendance+management+system+in+php+pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/essentials_of_human_anatomy_and_physiology_10th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/56239727254.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/tepimefawasuwupudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/nepemifarizel.pdf
    • https://static.usrfiles.com/ugd/f84671_5db1089139964e688888cc739f053fec.pdf
    • https://static.usrfiles.com/ugd/0789d5_4f81844126ba48f3bb05b958bbfc1a0c.pdf
    • https://static.usrfiles.com/ugd/2ca22b_7d923a220be64afe8fc7edbe851b708f.pdf
    • https://cdn.shopify.com/s/files/1/0435/9903/6573/files/massive_warfare_aftermath_hack_game.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/linux_essentials_midterm_exam_answers.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_off0000604a.bin
c36420cda4b6ce2fd24b2728a017202b907ea4699730d1cae31247a1ce63b02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604A 5532 bytes
font_01_sfnt_off00007308.bin
5c3d2f67e7485eaab73b5e80c4ae2d2dc48db271f6998c028ce2e0d2c1bbadee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7308 10812 bytes

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