Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afa1858ede9dc34…

MALICIOUS

PDF

55.1 KB Created: 2020-08-14 00:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d9f5a858129bde6beb9c0011adf14d SHA-1: 65dcce7c37a777856f00c0363a5d4ec9daa1bd82 SHA-256: 8afa1858ede9dc3449a654c9aeb3581b94d6f75c293cad58a2b8247eb615dfa5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chapter+18+endocrine+system+worksheet'. Additionally, the document body contains text that appears to be a worksheet lure, instructing the user to interact with URLs. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document may also attempt to trick users into executing commands. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to distribute 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=chapter+18+endocrine+system+worksheet
    • http://files.llanfairps.com/uploads/1/3/1/1/131163890/3452510.pdf
    • http://wired.cdsscouncil.com/uploads/1/3/2/6/132682883/39320045e8.pdf
    • http://sotuv.somedaynewfoundlands.com/uploads/1/3/1/8/131857054/xurezanukatafonitur.pdf
    • http://files.dragonninjawriter.com/uploads/1/3/0/7/130739835/894448.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/92693827451.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/jugotebixerizerapugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/46163746584.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/agricultural_science_textbook_for_primary_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/sosodutetova.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2375/files/glencoe_precalculus_student_edition_advanced_math_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/29488884135.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/42046868959.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/pewudid.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/suwuvilegovuso.pdf
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/86281901075.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/tujepitekopesifejur.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_off00008e88.bin
2da9586c5cf4a96ee1ba037b4a41e89f2706513496dc2986fc99905fd012730c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E88 2144 bytes
font_01_sfnt_off00009870.bin
3b8ce2390e7794e479c7dae6751e405347a2ec4d58fb835338e0a2a590e28b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x9870 5692 bytes
font_02_sfnt_off0000abb8.bin
e0a405877de2ca64828d2b70516dd8bdec2718e4562576957477e7619712d758
pdf-font-stream PDF embedded font (sfnt) at offset 0xABB8 10208 bytes