Malicious PDF — malware analysis report

Static analysis result for SHA-256 efff911463e8e79f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 14:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ea75ac58c083fbf697239aba1cde13c SHA-1: 897efa1f0ee0c319ff7f553ecb82c1b4280a60e1 SHA-256: efff911463e8e79f24f33ea003148560fa3400969b6220c11b73d943d785886c
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a known malicious redirector, and numerous other links, many hosted on Shopify, are present. These links likely serve as lures to external malicious content.

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=buhler+sortex+machine+Inde
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/solaris_sparc_os.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/leripegi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/lujoxomupawivixoziwap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/21099951874.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/28778547938.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/subomirapude.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/89232386066.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/vikupikezatuval.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7450/files/dnd_3._5_monster_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_63922fa31b41428287cf2be7e624960d.pdf
    • https://static.usrfiles.com/ugd/837d34_0d4f3bf9811644c2b757ccc7e9ebd78e.pdf
    • https://static.usrfiles.com/ugd/8127dd_472ffe6950e142468b2c64732f8362f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_add80f69af7b45b2aad35d6e86247471.pdf
    • https://static.usrfiles.com/ugd/b8c837_5115728ce64343c68e1683551c93fbcf.pdf
    • https://static.usrfiles.com/ugd/7598fa_cf2320a3587f4ee88f9c99dd40a56aae.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb41f20180e6413098396a9da2b9956c.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_off00006223.bin
74335b32af139b9b41b20bf9086e3e9f0124b8bad01842d29246cdd98674844c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 5208 bytes
font_01_sfnt_off000073af.bin
f036d9f13cf443d50f878b8f51e99755339384e809d4cbd963d499550792bce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 9908 bytes
font_02_sfnt_off000095a5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A5 4324 bytes

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