Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99ff5860e5b4652…

MALICIOUS

PDF

49.1 KB Created: 2020-08-01 22:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7dc7226b942f5da48a423424190f870 SHA-1: 97751ac814385925f5815b9a4988b4ef5de7d38a SHA-256: b99ff5860e5b46525938f90a6d1c9819b5e0b504b348adaa84fd6168cce5bd15
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a large number of external PDF links, indicative of a link farm for SEO manipulation. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern appears to be luring users to malicious sites via embedded links.

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=pathfinder+varisia+pdf
    • http://files.poweruperasmus.com/uploads/1/3/2/6/132682070/tapezerifuviko-mirubuxesuxav-dunulaz-bejesobupuxub.pdf
    • http://files.computerclubrhcc.com/uploads/1/3/2/3/132302768/zojoxizoxude_pinikuteluke_nudofapiz_butugovefimal.pdf
    • http://files.galloinvitational.com/uploads/1/3/1/8/131872105/dewoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/zolapawija.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/65963182457.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/34070323791.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/fujewagede.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/dafevolajemuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/xovosawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/3285536012.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/rafazegedobuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/nular.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/xumexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/32521735418.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/89200584405.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/elementary_statistics_mario_f_triola.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_off0000848c.bin
8e76677e6fe4ea79c038759d8e891dce6c27f06561318d6ee5b5b0d6948a7701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848C 5160 bytes
font_01_sfnt_off0000961e.bin
ae2c827ce80a621a6230184586c0f2c794a19cc27de4f938af59729b259900d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961E 9816 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.