Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd551acb33d2a16…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 10:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ff1bd8eaa9da537193c0a122cea7b34 SHA-1: 9ac6cad66d60f0ad5e3c3e3f1ae4139e4ebf7cd2 SHA-256: ccd551acb33d2a16414e225cc4270be1e9484988e43003fd0d723b832281ad7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'https://ttraff.ru/pify?keyword=mergers+and+acquisitions+journal+pdf'. This suggests a phishing or malicious redirection attempt, likely to deliver a secondary payload or lead the user to a compromised site. The ML classifier strongly supports the malicious nature of this PDF.

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=mergers+and+acquisitions+journal+pdf
    • http://files.southmountainheritage.org/uploads/1/3/1/4/131407492/gufugojoxemibur-livevowus-gibiduxitatupav.pdf
    • http://files.nourishlouisa.com/uploads/1/3/1/0/131070109/1506649.pdf
    • http://files.solekart.com/uploads/1/3/2/7/132712093/zudazezegosubu.pdf
    • http://jadip.kyliejordanartistry.com/uploads/1/3/1/8/131857334/sogutemonod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/33893059252.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/robozivadavikosalamuxej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2343/files/12177669252.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/gre_pool_of_argument_topics_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/tusijixinirenile.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/72994340272.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/fixurinunumevamuwifuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/macos_restart_vnc_server.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/2983829428.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/57944084784.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/71311150944.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/sony_rx100_manual.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_off0000678e.bin
ab13f205fb583d1b538b9b9a014e674f268483b772d21753b9f15658fe335d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x678E 5528 bytes
font_01_sfnt_off00007a78.bin
54efbc2925dd06a64d6664ea2fc03eb5611d5ebda90fb403d8c849b5bfc94649
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A78 10424 bytes