Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa217a72fffdbaa3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 22:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5200200540c871148e7b25462222153 SHA-1: 152a423cdad35158012424e6cc7bd52798d6770f SHA-256: aa217a72fffdbaa30e5b8745279d2b9c6eb4c28a8f9c2041134489b2a6b33602
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=bored+in+adjective+form
    • http://files.sunstarnurseries.com/uploads/1/3/0/8/130813860/7913496.pdf
    • http://files.wyattnations.org/uploads/1/3/1/0/131070938/gajedojarewo-ditumugi.pdf
    • http://gewukij.aksimsurgical.co.uk/uploads/1/3/0/8/130813747/9484774.pdf
    • http://files.medicalimagingstore.com/uploads/1/3/1/3/131379183/f912b088997.pdf
    • http://fekewopo.susanwattgrade.com/uploads/1/3/2/8/132816066/guxaguk.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/pudivazexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/ipg_carmaker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/4771370593.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/betaflight_f4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/duwikogiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/86574068758.pdf
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/alliance_onyxia_attunement.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/fusionner_plusieurs_documents_mac.pdf
    • https://cdn.shopify.com/s/files/1/0458/5917/6601/files/chickenpox_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4578/files/biometrics_security_system.pdf
    • https://cdn.shopify.com/s/files/1/0450/6412/6616/files/94435422951.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/79708877642.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_off000061c4.bin
568b01f792162557173f6bda0c412f355287aa928bc579ab7380e1a25bf585d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 5144 bytes
font_01_sfnt_off00007339.bin
7e5399e50356a03e884ddd6d63391ce84265211a1ead35dcf069dcd2bba2f553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 11168 bytes

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