Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df180e49d31f3c4…

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 06:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508a5a981477d3be6d23a14ffc35e89e SHA-1: f859226a5fab9a0a98714a4b021c8ce2e866f1c9 SHA-256: 0df180e49d31f3c458252b74f8dced625f1d743943a660bc448aa97fa75200bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document body and embedded URLs suggest a lure for free downloads, a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=cipe+2017+pdf+download+gratis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d775a9_46c8f72d0f63418babee6b173a62ec75.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5ee22d5d4194382b5ba869f65d86ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_559675a73b904d7ba612f4eb3e05f2b7.pdf
    • https://cdn.shopify.com/s/files/1/0462/6726/9277/files/anjaana_anjaani_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/1d4chan_age_of_sigmar_tactics.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/57668122580.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/pip_install_local_directory.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/tuwewotubarevuwutaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3287/files/fonedofiwosowusedonexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/34953871091.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/13654042581.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/verizon_points_auction.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/599619955.pdf
    • https://static.usrfiles.com/ugd/e3c460_4a72290c71e84351a1458cf6142462d1.pdf
    • https://static.usrfiles.com/ugd/19103d_3c610c9348a2468690b1dcb152ef97e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed4e5c9e25a441da7a1e67086ae9b1a.pdf
    • https://static.usrfiles.com/ugd/54fa57_eeb409d46901406d979823be2bb48b5a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c29.bin
b63bada86ea23fba25d91e779118c0402df78b522d6be5595db6a7fd77dd9952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C29 5612 bytes
font_01_sfnt_off00006f6b.bin
e0625838a7f4d86c80882866ba277250fefaa8f32fdd656652a65dbc58547542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6B 9980 bytes

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