Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6e1aedd136f8ad…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 22:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f4dd8129bb2aa019bfb8c0ba42181b SHA-1: faf8557a924d9851a7b233f92f6f59a111799f5d SHA-256: 1a6e1aedd136f8adaae4055df848a823f30ea5f253c4ded27a4331991d089110
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.me/wix?keyword=samsung+ht-c550+manual, which is likely used to direct users to malicious content. The PDF structure and the presence of numerous links suggest a link farm or SEO poisoning tactic to attract victims.

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.me/wix?keyword=samsung+ht-c550+manual
    • https://static.usrfiles.com/ugd/b8c837_5ae5a8526eff4daead8a6266f2e97379.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_a61f9897aeb64910a9de6d0f73e410f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_f998caf58f444d5c9ba04198824a294b.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/39044471634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0446/3896/1827/files/ecumenical_key_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/dabunak.pdf
    • https://static.usrfiles.com/ugd/565485_2b1bc9b65ce6401ab147f4c878b22085.pdf
    • https://static.usrfiles.com/ugd/7598fa_05ed0540ac004400b2a18b546f5a9ebf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/rockstar_lyrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/bacteria_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/kufitajedurerapoweno.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_off00004c84.bin
ef92b2256659418e54246e99d06aa3d907386a7feff012b68bdffe496174fa6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C84 5520 bytes
font_01_sfnt_off00005f24.bin
18277e494f3cae2649a7fd1812dd17eed9a91e664348295350554b5018d7786a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 10768 bytes

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