Malicious PDF — malware analysis report

Static analysis result for SHA-256 514eeaa428db6652…

MALICIOUS

PDF

51.1 KB Created: 2020-08-11 06:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c725196f80cfba7657059feb44ac78d8 SHA-1: d707d8562bd70bc8a2461c865a303e476c183580 SHA-256: 514eeaa428db66521f63bdf001699efd5a2b9c694fc1c739ef592c267b995e20
152 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 Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body contains text related to a book title and the redirector URL, indicating a lure to download content that ultimately leads to malicious infrastructure.

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.cc/pify?keyword=calculus+early+transcendentals+8th+edition+pdf+reddit
    • http://files.kinderdancenola.com/uploads/1/3/0/9/130969045/3506312.pdf
    • http://fovota.jpascalcreations.com/uploads/1/3/1/4/131438474/5335848.pdf
    • http://files.sidegiglikeaboss.com/uploads/1/3/2/7/132741162/fidubuf.pdf
    • http://files.endoftherainbowdaycare.com/uploads/1/3/0/7/130776487/nogenepegitesam_lafijejen_lekudix_rutogozibake.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/48882117578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/bipote.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/james_patterson.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/83510308242.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/famazewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/57137148848.pdf
    • https://cdn.shopify.com/s/files/1/0443/0499/0364/files/deductive_method_of_research.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/free_download_50_shades_of_grey.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/usb_fax_modem.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/baby_beanie_sewing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/88567632980.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_off00007436.bin
e997445ea3c9d4c1aea9eaa7ecc9c36b2aefd15c575df605de8454dd37b809e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 5444 bytes
font_01_sfnt_off000086a8.bin
4411b739a7a52b59e815fefff05a093c8f47411d879fd83f083a4ace97d17e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 7028 bytes
font_02_sfnt_off000099ae.bin
ad2ea6905eb1ce81c78d25a585b6bcd117ce69123a5406cf2d11a20e7389e615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AE 10956 bytes

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