Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34cc8f4f4a4044e…

MALICIOUS

PDF

44.7 KB Created: 2020-09-11 18:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ac788ab76ec7fd8ae632c6e7e129db SHA-1: 6b6918c2bedddab31f779c19339a0eb5dd6a735b SHA-256: c34cc8f4f4a4044edb606d4f3cb42949f709edd69e89406984b267d150eed886
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=osrs+crawling+hands+slayer+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, one of which is 'https://cdn.shopify.com/s/files/1/0437/2951/8741/files/directed_graph_adjacency_matrix_template.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=osrs+crawling+hands+slayer+guide
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/directed_graph_adjacency_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/7902579551.pdf
    • https://cdn.shopify.com/s/files/1/0463/9850/5115/files/35699145468.pdf
    • https://cdn.shopify.com/s/files/1/0464/1708/4584/files/family_planning_nsw_contraception_fact_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/kowifalatudukovez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1082/6146/files/attitudes_to_language_garrett.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/adobe_reader_download_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/advantages_of_learning_objectives.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/elder_scrolls_online_necromancer_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/35144845087.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/96485774219.pdf
    • https://static.usrfiles.com/ugd/e2f197_a7e6e68a8a7c4f9d9c48d02ebf5a85ee.pdf
    • https://static.usrfiles.com/ugd/7ff653_e45e6575e33b4f2d9cd061651f3c66c7.pdf
    • https://static.usrfiles.com/ugd/0e2875_8b8125a843564fb59890d10c150f05cd.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_off00006a04.bin
b2719d008e213e2eed68d2a1fbb9c630747d32af0f5668e9e174761eacccdcac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 5424 bytes
font_01_sfnt_off00007c7e.bin
f1c536b746fd74024c86efa8a43c458b571cdc63d98ba9f43ceb5d60a75d7a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7E 13020 bytes