Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b113790c45b77c0…

MALICIOUS

PDF

38.6 KB Created: 2020-08-13 22:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0b35811332a6a3b64e4759cc572c279 SHA-1: 2885cce198c347b683616fddb4661c09605f0f11 SHA-256: 7b113790c45b77c0a45f9e81a67a09f37f65efb500335384ebf2a480f2e8f692
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at `ttraff.ru`. The document body is heavily obfuscated and contains the same redirector URL, suggesting the primary purpose is to drive traffic to malicious infrastructure, potentially for SEO poisoning or further exploitation.

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/wb?keyword=sno%20tek%2028%20engine%20manual
    • http://files.oraclestheatre.com/uploads/1/3/1/4/131437626/sagugakukajip.pdf
    • http://files.eq-apparel.co.uk/uploads/1/3/1/6/131637357/7891023.pdf
    • http://bidadiwo.haskettconsults.com/uploads/1/3/0/7/130739704/1351964.pdf
    • http://vaxobokiz.stuartkettleartist.com/uploads/1/3/0/7/130775934/74fd80320386cb3.pdf
    • http://files.cassowaryday.org/uploads/1/3/2/8/132814276/7484443.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/jailbreak_ios_8._4_no_computer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/angle_of_elevation_and_depression_test.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/fesekedepironunitaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/rezozupuxutuxupumidoxenij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/gixavaxutezasumalipitot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/73972736858.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/76246601424.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/bankruptcy_and_insolvency_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/96_seadoo_xp.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/accelerator_pedal_position_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/veer_bala_rastogi_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/46989678410.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/30472804843.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_off000058cc.bin
74c470a42418d9fe42fe8e1a7d6726d3b1128126aa4a844c103744ac35e36bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x58CC 5224 bytes
font_01_sfnt_off00006a83.bin
353bde08aea38ed397d6dad69558656e1bd94ebea43ba8da2cb4c10dc8f3b04c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 10388 bytes