Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b097c1891decb…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 05:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f176a694cec34ce57b2521514396152 SHA-1: 8de8a192a7cf66d8c5d15d09ed37447c30b49706 SHA-256: 1d8b097c1891decb013bfbd53cf76542d61d337afb89257777d6d0ef7519827d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to ttraff.cc, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=massey+ferguson+serial+number+lookup, which is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=massey+ferguson+serial+number+lookup
    • https://static.usrfiles.com/ugd/b8c837_0e2117e68b004dbc897498a972b48566.pdf
    • https://static.usrfiles.com/ugd/934fc3_53a215d7d96e48e28050b71b470d42fc.pdf
    • https://static.usrfiles.com/ugd/913720_8eb07477f68d451385443effe0479cd8.pdf
    • https://static.usrfiles.com/ugd/225520_3c0e31e574a04e53981945e3ef647eea.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/wugopoluxujerivasili.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/windows_xp_activation_loop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1191/5432/files/zivirawadezufipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/annals_of_internal_medicine_guidelines.pdf
    • https://static.usrfiles.com/ugd/0f5b72_1ac39e5d8c8f489797a9eb2d0526fca1.pdf
    • https://static.usrfiles.com/ugd/e3325f_21afde6ad9e84268b3a73365d0535970.pdf
    • https://static.usrfiles.com/ugd/0049ca_76f2b18704d94168be6c39c42bf0eca1.pdf
    • https://static.usrfiles.com/ugd/e3ff21_7d99d10ed7fc476dbd374e97061de53c.pdf
    • https://static.usrfiles.com/ugd/b8c837_734620907916414b9d79088a36a73126.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/udp_tracker._trackerfix._com_80_announce.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/pagurumonirixopolokazaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/godolepasudobebaba.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_off00006968.bin
2fcd7aa7cd4691d13ef20f768d0e822582e2629bfc0bc0e2e1569b8b1340693f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 5532 bytes
font_01_sfnt_off00007c2f.bin
75f2763836da461c4d8d015555934c52cd903c84fb7553a0c366a94b1796a3b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 14404 bytes