Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea41c7e43c5ea9…

MALICIOUS

PDF

37.4 KB Created: 2020-08-14 22:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dda0dcf357184d91c8ebd9638676c58e SHA-1: 0913db9e5e5e033ec6097f210dbdf732ba6386fa SHA-256: ceea41c7e43c5ea98d8ba616b6b54fc491184578f8835c09f25ffc1e7bdf86af
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the text 'Computer network ppt template' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=computer+network+ppt+template
    • http://jakila.atleet.fitness/uploads/1/3/0/7/130776460/129306.pdf
    • http://files.attitude4acting.com/uploads/1/3/1/3/131380482/barimefon.pdf
    • http://files.thechelseaclaire.com/uploads/1/3/1/4/131483201/jarajul.pdf
    • http://gafafasor.phillipsburgcomiccon.com/uploads/1/3/2/6/132681352/dfe27.pdf
    • http://files.taniamansfield.com/uploads/1/3/2/7/132740949/ladolip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/josaxusevowagonifefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/mental_disorders_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/98357141361.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/wizemajedife.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/vazedoganimipefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/94094251952.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/brche_erklren.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/xebega.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/free_life_selector.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/17653586063.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/54811575091.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_off000055b1.bin
1ae4911e8b9f247b7c885ba4cfa726f0f39795905e363e4a5570b5f7e792f05e
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B1 4848 bytes
font_01_sfnt_off00006622.bin
9ca139c38751451c5a7d6cd7ef3a00528b08160a6d434621d126e7c246fbf87d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 10428 bytes