Malicious PDF — malware analysis report

Static analysis result for SHA-256 97466b16ceb04599…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 08:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea839b366078165dfc1142321a78acbd SHA-1: cff1816a8c09bcb324dc73d1dd2ee7de0d98baa2 SHA-256: 97466b16ceb04599da868455bc69993582558397bd2fd5d6b57af84aabe8e95d
154 Risk Score

Malware Insights

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

The PDF contains a lure promising free game downloads, which is a common social engineering tactic. It embeds numerous links, including a critical redirector link to 'ttraff.com'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent. No scripts were extracted, but the document body and heuristics indicate a phishing attempt via a malicious URL.

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=minecraft+game++free+pc+full+version
    • http://devozuket.saltlakeconference.com/uploads/1/3/1/6/131637814/7831030.pdf
    • http://files.jdeducation.org/uploads/1/3/1/4/131453174/dawifipak-seserixuxivi-wutisuz-dexofupa.pdf
    • http://files.crystalsentwined.com/uploads/1/3/1/4/131406558/mafimosare-vixatoso.pdf
    • http://sidovix.macmastersbeachprogress.com/uploads/1/3/1/4/131407995/4694481.pdf
    • http://tonibux.readingdrive.org/uploads/1/3/1/4/131407089/4674984.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/76818131555.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/fudirekododo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/76146323422.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/83328305143.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/73938103436.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/sailing_out_jhene_aiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/nezemoxagadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/74066934992.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/mizunisewaloxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/31568532717.pdf
    • https://cdn.shopify.com/s/files/1/0450/3057/2190/files/brian_weiss_miracles_happen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/p90x_classic_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/beginner_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/99043218269.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_off000070d0.bin
f264f905633acea305c3bac8fca76d2fc33fd23aa05d788694ae9c67a68a5da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 5400 bytes
font_01_sfnt_off00008328.bin
113675defbf2c701bfc464367aa0f89584487ce72eb201c314245c2702459bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8328 10588 bytes

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