Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc008681db3e1c44…

MALICIOUS

PDF

43.7 KB Created: 2020-08-21 13:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e891513aac40e21fcf8a4ba81ca4ee82 SHA-1: e1c3ffcffd5c6b959cd95a0192d56561fb49a3a4 SHA-256: fc008681db3e1c44c064fb578db080faf607b494948af10c180ced462cea191a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=metformin+success+stories+pcos+2018', suggesting a lure related to health topics to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link-farming or redirection scheme.

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/pify?keyword=metformin+success+stories+pcos+2018
    • http://nusipegam.boyscout507.org/uploads/1/3/1/3/131398097/d02f0559.pdf
    • http://wuvidod.microbladingbyz.com/uploads/1/3/1/8/131857247/bakurunekaxu.pdf
    • http://files.talyakingston.com/uploads/1/3/0/8/130814209/cef78efb4.pdf
    • http://files.708boutique.com/uploads/1/3/1/3/131398145/604428.pdf
    • http://zuruwusun.wholeheartedsolutions.com/uploads/1/3/0/8/130814328/783d4316283.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/bovobowasebe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/nowilupotefuzigerepibipaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/the_quantum_astrologer_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/rimav.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/lewipemunalafopot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/lujasomub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/13077663636.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/gupesekupajiviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/5514834024.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/certificate_template_free_download.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_off00005f98.bin
44a1726be7807f2cde00ece06e5b923f0af61d65d6f9875f10dad64464c824a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 5324 bytes
font_01_sfnt_off000071b5.bin
d9b1be5edca04097d102aa7e7256490e6abb3a006d94d816f5e33a92cd7b6cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 10056 bytes
font_02_sfnt_off00009403.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9403 4324 bytes

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