Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc21b50b208b4467…

MALICIOUS

PDF

126.4 KB Created: 2020-08-11 23:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7767479c2df797a2bb54fb2419ea6175 SHA-1: 5a2c0ecba0e7f9f5ce8b0c7e69fa4c56b90da122 SHA-256: dc21b50b208b4467ba0116e2cd3e1d2e02485c998ab80a9e275b1436e78ff022
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.ru, which is used to lure users with keywords like 'focus group research design pdf'. It also contains a PDF link farm heuristic, indicating mass generation of links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves redirecting users to malicious infrastructure under the guise of providing research design documents.

Heuristics 3

  • 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.
  • 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/wb?keyword=focus%20group%20research%20design%20pdf
    • http://mukewogaj.neemcalendar.org/uploads/1/3/2/6/132681352/ec76c4b051f2.pdf
    • http://files.lucascountyiowa.com/uploads/1/3/1/4/131407692/galefazazamobinowixo.pdf
    • http://files.susanmateuglass.com/uploads/1/3/0/7/130738894/fonufogexotakiw.pdf
    • http://files.caninejudged.com/uploads/1/3/0/8/130874101/6794419.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/hip_hop_dance_move_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/clinical_chemistry_laboratory_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/68881104146.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/81268654139.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/33752891499.pdf
    • https://cdn.shopify.com/s/files/1/0438/2221/9421/files/pemobujekisefufexifavikov.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/openssl_client_certificates.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/96740801539.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/jiguretopiwelevik.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/2638363556.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/tovezig.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_off00019bc8.bin
b24b9b544424b0169ab9aa2447ba25e4c6f0639a67f1e99d2da743d499052e89
pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC8 5140 bytes
font_01_sfnt_off0001ad34.bin
e488abd3d585d5ccb892d9dfbdcf3e80aeb760a0a52b31e0fc4ecc2bd2bd5b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD34 15672 bytes
font_02_sfnt_off0001de13.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE13 4324 bytes