Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31b4bcd629bf312…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 20:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f10d15a130b7c90c37daae16eb4bf528 SHA-1: f06f2dca7b4acdbc2d1c7cc1dd550cbc2c7b1f03 SHA-256: b31b4bcd629bf312a187d303d0069f1f4840726c4f2fc4bac58c6458c970d9bd
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one heuristic specifically identifying it as a PDF SEO link farm. The primary malicious URL, https://ttraff.com/wix?keyword=kagan+seating+template, is flagged as a known malicious redirector. While many other links point to benign content on Shopify, the presence of the malicious redirector and the sheer volume of links suggest a deceptive or manipulative purpose, likely to drive traffic to malicious sites or for SEO abuse.

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/wix?keyword=kagan+seating+template
    • https://static.usrfiles.com/ugd/b8c837_17394378c2454fe4af15017234932237.pdf
    • https://static.usrfiles.com/ugd/b8c837_f48536f7208c499baacd5fd2431ace0c.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_e400afeab6b341a0b0daf82006dd0bc5.pdf
    • https://static.usrfiles.com/ugd/1be480_f9d5c823ac964cdc88384f7e97757277.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/wondershare_filmora_free_full_version_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/witikimevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/16744434882.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/43699587290.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/super_mario_64_ds_rom_doperoms.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/kemuwezisitufesovobin.pdf
    • https://cdn.shopify.com/s/files/1/0438/4214/2358/files/teaching_for_young_learners.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/fodufines.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/49122899938.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/doxuxagekujuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/toriropizu.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_off00005e26.bin
add996c6d7e5d9210a14445fb6b0f6b6fe792043ef01abc6ea9bfe768ae48a30
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 5012 bytes
font_01_sfnt_off00006f2d.bin
25bbaba24434c08b844ad5f29b635bd4bab12caa10521bdafec9b41152fcff9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2D 9932 bytes