Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0378f8a3b574518…

MALICIOUS

PDF

55.7 KB Created: 2020-08-03 08:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9c9cf621bc821c1f4eecf94c6da700 SHA-1: e96b9626359455dc9b265e11560852016d95f76a SHA-256: b0378f8a3b57451805d7f208bfc748ee544baf335a39c73578144151003f6419
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, ttraff.com, which is flagged as malicious. This redirector is part of a link farm designed to appear as legitimate book downloads, likely to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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=fundamentals+of+applied+electromagnetics+6th+edition+pdf
    • http://files.whatsthegfc.com/uploads/1/3/0/8/130815009/porumu.pdf
    • http://files.nlaofshreveport.com/uploads/1/3/1/0/131069824/vugenotubufawe.pdf
    • http://files.inbusinessforlife.org/uploads/1/3/1/8/131856715/tobololakujisek_savogiki_zimenevuvawe.pdf
    • http://files.stjohnsfoods.com/uploads/1/3/1/4/131412181/2e53ec0c5f.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/81919285212.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/miditojadanuwuzeluburo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/29304146121.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/dubafogirebofojewuliputel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/tawasogamizalerilisofanuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/52347120395.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/61616208023.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/sasuxunojudowezogubebaxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/doxikotosul.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/amerika_rammstein_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/vimilufikoferuveni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/bryant_plus_90_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/average_window_size.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/the_walking_dead_graphic_novel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c5a.bin
87f54107e8b800c4ad19370bd954ab87a7c66bd7ed050ff3a7b214ed6d5b21f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 9528 bytes
font_01_sfnt_off00008bfe.bin
d05442eff6be4b4d32b624bab4987df21e8818e1e167d02adb821879f890a40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFE 5680 bytes
font_02_sfnt_off00009f27.bin
be24a90e161e3b54ad1741f5b13cca45d5c58dc4e4f03a5891113e371b8bc752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F27 16096 bytes

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