Malicious PDF — malware analysis report

Static analysis result for SHA-256 854c9881bef5b930…

MALICIOUS

PDF

43.2 KB Created: 2020-08-08 22:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf375463f5c431c762ded5a9c0498f8e SHA-1: 1b2fe02ab7105b9d9b4f3ae7ea7e0fda90cfb970 SHA-256: 854c9881bef5b930b4ce620a9d32e149dbb8a9659fa481b2c7f12f9ba2281d55
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and text suggesting a lure for a 'free download'. The PDF also contains a link farm with numerous external links, many hosted on Shopify, indicating an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=alter+ego+4+pdf+free+download
    • http://files.8ritual8.com/uploads/1/3/1/4/131438180/f44acf2b.pdf
    • http://files.jonathanschakel.com/uploads/1/3/1/4/131455275/ea84d1a21c.pdf
    • http://files.mattnevergivesup.org/uploads/1/3/1/8/131857758/seregudokupi-gezovi-sinodate.pdf
    • http://juguwiz.gvdesigncontract.net/uploads/1/3/0/9/130969754/gisenejixa_luxarojulus_zuraxobugus_kugekis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2840/4632/files/josibisunekalufimiluzod.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/crate_bx-_15.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/nonuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/search_engines_information_retrieval_in_practice_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/bypass_capacitor_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/45608344931.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/78572262856.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/neworogif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/1546276718.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/75727140924.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/binomial_expansion_formula_1_x_n.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_off00005c8b.bin
ac8808f3a04216aa017f04d975b53b4a4058c577b1a4adf5e23cb795e3860984
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8B 4940 bytes
font_01_sfnt_off00006d7e.bin
ea04693c962e93cf817ee7238ebde1c23a8c394ea4dd97b4e403bcde39d55df6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 10788 bytes
font_02_sfnt_off000091e3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E3 4324 bytes