Malicious PDF — malware analysis report

Static analysis result for SHA-256 1faa3dd13d8d6177…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 06:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28e8b7dc5531eedc4cec3febfb77577d SHA-1: 775803ee2301b9b9bcc40d6a3746d8c17140d3df SHA-256: 1faa3dd13d8d61770434ce628e0b4e128b05f06484672daa4f256da96f7655ec
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=caterpillar+iso+9001+certification+pdf, which is designed to lead users to further malicious content. The document body itself is heavily obfuscated but contains references to the same malicious URL and other PDF files hosted on Shopify. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=caterpillar+iso+9001+certification+pdf
    • http://files.abcbookreview.com/uploads/1/3/1/6/131606762/sodojolobi-nameku-rijivipi.pdf
    • http://files.norwichstudentlettings.co.uk/uploads/1/3/1/3/131380942/a7a19e67c.pdf
    • http://files.brokorgreenhouses.com/uploads/1/3/0/7/130775644/2dd264.pdf
    • http://pakidasu.kbgaragedoors.com/uploads/1/3/0/7/130775403/jinigenazos.pdf
    • http://files.schoolofhardknocksnc.com/uploads/1/3/0/7/130738712/wanajelakezaruvesop.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/84701992599.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/ramelederekekajawuxakiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/77717417197.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/62604532401.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/crv_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/16218237910.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/lotupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/ritidojasamudebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/jujasamazosugakojozol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/bitibufuwevesiwarefezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/the_nanny_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/53892003845.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_off000067a4.bin
18d69b566132471c2f051a7b7154760b41f36d5249ac9c8139a89a6f5d078b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A4 5404 bytes
font_01_sfnt_off00007a0d.bin
da34e661e7170f8518931202cbbc2ba950da5decf53fe349aa4f6185079908d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 9964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.