Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad149d3f036faee…

MALICIOUS

PDF

45.5 KB Created: 2020-08-03 16:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65e7298f511ddc762435079776ceea5 SHA-1: 696985886693e200b9ea02660ae90827607c94be SHA-256: 3ad149d3f036faee36cc3de256cf8c9436bf8b504be0bf9cc46916be234b9a4e
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, while containing garbled text, includes the same URL as the malicious link, suggesting an attempt to disguise the malicious intent. The presence of numerous links to Shopify-hosted PDFs, while some are benign, indicates a link farm strategy to improve search engine visibility for 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.com/pify?keyword=os+princ%25C3%25ADpios+da+administra%25C3%25A7%25C3%25A3o+cient%25C3%25ADfica+pdf
    • http://files.kauaimusiceducation.org/uploads/1/3/1/3/131380308/likawubed_salujejigedor_koseji.pdf
    • http://files.stmarysstonehaven.org/uploads/1/3/1/8/131856131/zuwujujap_vetat_fibonogod_seduvuromug.pdf
    • http://files.tivertonhsboosters.com/uploads/1/3/1/4/131453194/vixijobopogawiza.pdf
    • http://files.superiorselfwithkjlandis.com/uploads/1/3/1/4/131437626/tawubarosax.pdf
    • http://files.upperarlingtonmusicacademy.com/uploads/1/3/0/7/130739570/pusasagovet_simozizusa_guwoto_jinevaxogit.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/61494910045.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/23698598111.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/25723180205.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/28689113492.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/tracy_chapman_greatest_hits.pdf
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/database_system_concepts_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/tumovoposabupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/volexoza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/61405325207.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/naruto_go_launcher_themes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/72253898421.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/kobunologoli.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_off00006eec.bin
314933c75b7b2d0603436772c8e0262e9dfcdc3b83fd50cf404ddd45dc82d6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 5848 bytes
font_01_sfnt_off000081e5.bin
b9888bffc6fec3965644f99f1b8d25ecc9f61459149c5e33aa173a7dc42ef321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E5 11988 bytes

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