Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c42e0d3bcc7a14a…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 08:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef6af91c6039aad0d46c35669db8dc6 SHA-1: 57be017228e1ff709b6ceb20b9749a158becf072 SHA-256: 3c42e0d3bcc7a14a26cd1793a8fd81d15910f1a96a97e95ac13b23a04737da4b
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 of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The heuristic firings confirm the presence of malicious redirector links and a link farm structure within the PDF. The primary goal appears to be directing users to malicious sites through a deceptive link aggregation.

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.cc/pify?keyword=coronary+atherosclerosis+pdf
    • http://files.ladkilove.org/uploads/1/3/1/3/131379219/66046.pdf
    • http://files.festivalentreislas.com/uploads/1/3/2/7/132710621/difuwexapedilelira.pdf
    • http://files.intersektart.com/uploads/1/3/1/1/131164386/7701719.pdf
    • http://files.luckypennyrealty.com/uploads/1/3/1/6/131607027/9178004.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/fusionner_sans_logiciel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1351/files/xizuvibaguguwajuzizaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/100_accounting_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/basic_english_learning_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/56422869821.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/11797640137.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/suxizatuborolebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/cell_culture_techniques_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4304/files/exceptional_learners_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/kukav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7944/1307/files/17158658678.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/wufewesopozas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/96189571594.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_off0000688b.bin
9fa2c42dd35e6a31c35048041ce3083904f01d35d58dd984114b9825505c4c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x688B 5248 bytes
font_01_sfnt_off00007a60.bin
a239f02f8a6e4acdededddb63fd62df6eec3a43d2c4b38339a09f73a297f522e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 10656 bytes