Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf46c533970800a…

MALICIOUS

PDF

48.0 KB Created: 2020-07-27 23:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92dd5f392f9596d5910f3e4695f64833 SHA-1: a113ae625c0b09a0e69b1e37d88af63302ccce33 SHA-256: ecf46c533970800a4c30fd9d9932b07914ca5445cde4b69b93549cb3b1c72812
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a worksheet answer key. The document also hosts a large number of other PDF files, likely for SEO poisoning to improve search engine ranking and visibility. The primary malicious URL is ttraff.cc, which likely leads to further malicious content or exploits.

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.cc/pify?keyword=isotopes+and+average+atomic+mass+worksheet+answer
    • http://files.srrlsf.com/uploads/1/3/1/3/131380868/4f04903295aa5.pdf
    • http://files.bedfordpsychologists.com/uploads/1/3/0/7/130776639/wabusu-zixevife.pdf
    • http://files.xtorch.org/uploads/1/3/1/8/131856195/bufelukugerimanifafa.pdf
    • http://files.compassionstaffing.org/uploads/1/3/2/6/132681476/bonodijadegine.pdf
    • http://files.infiniteecoclean.com/uploads/1/3/2/7/132710603/1061986.pdf
    • http://files.xtorch.org/uploads/1/3/1/8/13185
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/zudiwujabeta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/14440822805.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/72200823497.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/84408365089.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/putujajoge.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/favadovefex.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/tiramavoragariseril.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/xirixupesefadifow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/25916344810.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_off00007c78.bin
3fded3b694ebaec80f5a930cb7156eaac4842f7e3426fb6acab955f3e0589a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 5396 bytes
font_01_sfnt_off00008eb1.bin
e58f684383bf58485c302a698dc0e1b048867c55c2327449f01cc9ebd05a8ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB1 10452 bytes

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