Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7031dd1d678037…

MALICIOUS

PDF

32.6 KB Created: 2020-08-05 18:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b666b5b3bd7bfb163e44932aacdf37a5 SHA-1: aa575da1c7d1bb40a588877438cb1a81dfd5d357 SHA-256: 4a7031dd1d6780373b7dbc998c82610ed51a52779fd7f62eb900ac4743d35275
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to create SEO link farms. One of the primary links redirects to a malicious URL, ttraff.com, which is known to host redirector infrastructure. This suggests the document is designed to lure users into clicking malicious links under the guise of providing access to book-related PDF content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=battleships+yamato+and+musashi+anatomy+of+the+ship+pdf
    • http://files.paulhikes.net/uploads/1/3/1/4/131453539/d671b2c.pdf
    • http://ziwote.murphcooperlab.com/uploads/1/3/2/8/132814930/ranosenimus.pdf
    • http://files.akillerstory.com/uploads/1/3/1/6/131606411/5713817.pdf
    • http://files.cosmicguloso.com/uploads/1/3/0/7/130776120/limirepidawosik-jutuwufeteruva-mujabopuni.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/88270010331.pdf
    • https://cdn.shopify.com/s/files/1/0433/9050/1020/files/lejagamelozu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/poxaguregufewolejatod.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/walakifigipok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/21121178717.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/tobogorinufikuguwovenewem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/how_to_make_fabric_in_little_alchemy.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/health_and_physical_education_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/xebet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/zapedenoget.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/poema_beowulf_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/60952241196.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_off000044d5.bin
8e90157d834751f38912cdd04255c2835241a684f740fbf3ae9ec7bd99ea85c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44D5 5336 bytes
font_01_sfnt_off000056e3.bin
de64e06e7dc60f73c95daf1d1c6cfc8822c0687de30ea741dde22f6ca9908be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E3 8816 bytes

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