Malicious PDF — malware analysis report

Static analysis result for SHA-256 abac462a25bf28e4…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 14:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59c92d2c25db1fad7981a8782a163531 SHA-1: 31befaea46320f85ee8bd44b959aa5a7e8ae1d27 SHA-256: abac462a25bf28e481274191f4dbac9db1406f80ddd766fa7d3ab67b8c6e9a1b
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 Shopify domains hosting other PDFs, a technique often used for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=interpreting+graphs+of+functions+answer+key'. The document body also contains this URL and other PDF links, suggesting the primary goal is to redirect the user to malicious infrastructure.

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=interpreting+graphs+of+functions+answer+key
    • http://files.littlehorsevintage.com/uploads/1/3/0/7/130738889/9f6cf0721ba5.pdf
    • http://bosidub.newhampshirewoodworks.com/uploads/1/3/1/4/131438324/maferopigakagal-rasetumu.pdf
    • http://xubovik.uowl.org/uploads/1/3/1/3/131384240/7293981.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/xanewefubedufekubomax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/nizusudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/tolewizorageroz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5468/5599/files/72576883506.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/verbe_etre_en_anglais_forme_affirmative_negative_et_interrogative.pdf
    • https://cdn.shopify.com/s/files/1/0462/7539/5744/files/aktu_exam_date_sheet_mba_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/texetopepotugipatoroput.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/74273851854.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/zeduxasimurawawobedasemik.pdf
    • https://cdn.shopify.com/s/files/1/0437/6536/6933/files/employment_news_paper_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/css_position_absolute.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/data_structures_and_algorithms_in_swift_raywenderlich_free.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/
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/data_structures_and_algorithm

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000609a.bin
1e037d885ca27ff6d0023cbf2d73300f9c3ba9e997b0e940278b4148067fa59b
pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 5440 bytes
font_01_sfnt_off00007329.bin
8d374693619807fc3e3e1911d88a15d2850b7633cbfc73459b7cd2c77650481b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7329 10356 bytes