Malicious PDF — malware analysis report

Static analysis result for SHA-256 9057893bb4808cb3…

MALICIOUS

PDF

36.2 KB Created: 2020-08-30 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21ce0fd7334db76fc763f73785df4fd6 SHA-1: 51a7fad34133c5901f3350dfe26a3a82d0f87090 SHA-256: 9057893bb4808cb37aa98f11665675ff5fba31cc1805f77703772499eac7b136
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL 'https://ttraff.club/wix?keyword=new+orleans+hoes', which is flagged as a malicious redirector. The presence of numerous links, including a confirmed malicious one, suggests a lure for phishing or malware delivery.

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/wix?keyword=new+orleans+hoes
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/vofagadizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/game_ppsspp_carnivores_dinosaur_hunter.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/technic_launcher_minecraft.pdf
    • https://static.usrfiles.com/ugd/e33828_5c144f6cf8c14db98b11f422e9ded3e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3d689228164c1db9f51abafd93d476.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2073b104cc74ced9fdaba9c8dc72939.pdf
    • https://static.usrfiles.com/ugd/45e30f_367bdae294964a86ab3583322dbe28ff.pdf
    • https://static.usrfiles.com/ugd/b11f6d_1fa519f4001d4bb0af8ae84062f6be9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/pekonolejova.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/gaming_tablet_android_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/1041987345.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/kinuvivawinolikowuse.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_off00005217.bin
4e0359cc4d83c920152b0dae5db274c60a3ea5274b6504635f80846d945bfe99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5217 4836 bytes
font_01_sfnt_off0000628d.bin
8a49d7782bdfc41f34a247f14082959cfe0aa7e921b932d18d29d59b3f06ffb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 10024 bytes