Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e4bca828d9a435…

MALICIOUS

PDF

49.6 KB Created: 2020-10-17 00:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db788c378b066e1145ba3daecbfb99da SHA-1: 01ebb1bf771c673ecdd7a160c7d78df35843c634 SHA-256: d5e4bca828d9a435a7f759152f53398efc417771ac5f995c39b3774c4345a504
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, https://ttraff.club/123?keyword=download+all+pdf+reader+pro+apk, is designed to trick users into downloading potentially malicious software. The PDF also exhibits characteristics of a link farm, indicating a broader effort to distribute 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.club/123?keyword=download+all+pdf+reader+pro+apk
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/koxatan.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdf
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a0bf0a90f0.pdf
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8a0bde04988.pdf
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f88865d0c2cf.pdf
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f899746418fb.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8819b82ab94.pdf
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/teburuvunefudu.pdf
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/xexijolanidev.pdf
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/lojowuzesewat_tuxabikugu_wepapemefik_vizepibodu.pdf
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87306559ee1.pdf
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8a0b9a35811.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f875b9a843d9.pdf
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8a0bbf10c03.pdf
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f89d6a97d1b9.pdf
    • https://dutitujaz
    • https://uploads.strikinglycdn.com/files/8745c46f-16bf-4eae-9d0c-6eeeeea74638/wegipajeviwiverojefaze.pdf
    • https://uploads.strikinglycdn.com/files/87913c82-3aca-4070-ada0-423b2286c354/93054301703.pdf
    • https://uploads.strikinglycdn.com/files/f9e7783a-5053-4bfd-8433-7e6bf4d801ad/19600879158.pdf
    • https://uploads.strikinglycdn.com/files/8e272c42-a00f-4204-a1d9-5100e8256561/pitivox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/bosarutam.pdf
    • https://cdn.shopify.com/s/files/1/0266/8979/8317/files/fupupuwirarubukuku.pdf
    • https://cdn.shopify.com/s/files/1/0498/0119/9777/files/slim_ambition_keto_website.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/soenix_unblocked_games_tetris.pdf
    • https://cdn.shopify.com/s/files/1/0492/2376/2086/files/sexy_disney_princess.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_off00006f6b.bin
89d9be72929b4c00519e6bbee13303089667acdd579cc54d0e4311afe371cc28
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6B 5012 bytes
font_01_sfnt_off000080a2.bin
d5ff77feda0c90ba7c1561365c57f51ddb8b2bb0c9c45d0fa8316b650093a82a
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A2 10112 bytes
font_02_sfnt_off0000a338.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0xA338 16092 bytes