Malicious PDF — malware analysis report

Static analysis result for SHA-256 443d945f83a818de…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 02:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bdbf818253d762d46a502a9b37cad75 SHA-1: cf2572e2a57a17fdb31f05d179f081b750af7358 SHA-256: 443d945f83a818deb201effc65511954152b6933671635ac861eac87d3cc1273
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to lure users with keywords like 'android app alarm clock with music'. The presence of a link farm and a malicious redirector suggests a campaign focused on driving traffic to potentially malicious sites, possibly for SEO spam or phishing.

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=android+app+alarm+clock+with+music
    • http://files.dkg-betadelta.org/uploads/1/3/2/3/132303068/2014468.pdf
    • http://files.gener8tionalconnections.com/uploads/1/3/0/7/130775441/desoxid.pdf
    • http://files.vertexprofessionalpainting.com/uploads/1/3/2/6/132696174/7361202.pdf
    • http://duruli.alchemistmovement.org/uploads/1/3/0/7/130775840/somafosev_didaja_babukuvuki_gonopoju.pdf
    • http://wuzukito.beautifulfeetentertainment.com/uploads/1/3/2/6/132695535/9985784.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/gaxebeviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/kewikegotisoxatidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65788935473.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/pujugudivapiwojerabewep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/dorizajox.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/18203634944.pdf
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/27815726962.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/24223142472.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/antologias_de_cuentos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/32952136405.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/tuwojamajebiturufatomofuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/16733944741.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/26487342032.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/soxeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/febavivatejila.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_off00007290.bin
579fbdb1bc43567a786ab56ee01c338d2ca807ef2198fab90a6e4312a8568d00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 5456 bytes
font_01_sfnt_off000084fc.bin
8e8acf44206e81443dc69bdd2db1048ec59a1aa6cb6530d029e174076e21805a
pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 10108 bytes