Malicious PDF — malware analysis report

Static analysis result for SHA-256 202cafad293b0fc6…

MALICIOUS

PDF

57.5 KB Created: 2020-08-31 14:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3746272fa07c70247c54760ac0ca44bc SHA-1: d0ff224274091f0cfdc021109f58db9d427d6f7e SHA-256: 202cafad293b0fc635f543cca0df4f901a58755c1d0980f2aa0af31f3f79dd6a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a worksheet answer key. The document body, though heavily obfuscated, contains the same URL and keywords related to educational materials, reinforcing the lure. The presence of a link farm heuristic suggests the PDF is part of a larger effort to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly indicated maliciousness.

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=geometry+cp+6.+7+dilations+worksheet+answers
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/apprendre_l_arabe_classique.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/18559027961.pdf
    • https://cdn.shopify.com/s/files/1/0428/7925/4694/files/babunovametamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/capital_one_money_market_vs_performance_savings.pdf
    • https://static.usrfiles.com/ugd/739437_316750990db94870adca3a0a0ce66c00.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/lelololupizepe.pdf
    • https://cdn.shopify.com/s/files/1/0462/7457/6533/files/netad.pdf
    • https://static.usrfiles.com/ugd/b8c837_4012ea162c86463cb9bb75f0ce27a43f.pdf
    • https://static.usrfiles.com/ugd/9374a7_15b7955bd8234c749e48080f6e74cfe4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f139695ee2484889a870e9f9d6725a17.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_off00009efc.bin
ac2a2417cc83399478cfc9662676fa7a4419db39f4d20c4bb7c032a0d225737d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFC 5868 bytes
font_01_sfnt_off0000b2fc.bin
286753ea79902b40b17eb2ece670e86d2316a7f0bb437d8a0f2bc335a5f9e31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FC 11300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.