Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f02d0ce811c1f03…

MALICIOUS

PDF

118.6 KB Created: 2020-07-30 16:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97bf19db3ac82dc4f31345a3a11d2af8 SHA-1: ed867d7b6a8f653ae57f1ebb39bdd32d82cc3a1b SHA-256: 9f02d0ce811c1f0390e47d0f2c7c9b002ae74e6c410f6a0870a0d48acb30b98e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning to drive traffic to malicious sites. One critical heuristic identified a link to a known malicious redirector at ttraff.ru. The ML classifier strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, preventing a deeper analysis of its content.

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.ru/pify?keyword=cuentos+de+eva+luna+isabel+allende+pdf+gratis
    • http://files.lynniashanley.com/uploads/1/3/1/0/131070098/1454330.pdf
    • http://files.jenimcray.com/uploads/1/3/1/0/131070911/lakigaxafuzidupu.pdf
    • http://files.toplineeq.com/uploads/1/3/0/7/130776712/dawozudugotuw.pdf
    • http://files.gracewithlight.com/uploads/1/3/0/7/130738566/mobodasufe.pdf
    • http://files.protectplayanow.org/uploads/1/3/2/6/132683121/5013231.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/95077288284.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/wirulidowakimutalokod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/devajovuzeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/rapomeviwuvegagifej.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/35899448579.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7014/files/91456272713.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/gajadipuzimeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/75925810080.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/32457785874.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/jusuvawatuvapexeru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/73463771885.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/43512924198.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/lilifenidixev.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/78586202529.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_off00019285.bin
ce2c01d4045e4093d9f01c58d977732c73242ac9b95791be098a6b9dbd029e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x19285 5312 bytes
font_01_sfnt_off0001a4a9.bin
f652487fcfd4cc282e09bd94055af365836b21a6dbc1365f26eca011a5c820d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4A9 11708 bytes