Malicious PDF — malware analysis report

Static analysis result for SHA-256 951dc89c86432792…

MALICIOUS

PDF

47.0 KB Created: 2020-08-10 16:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0583ed805d3afb1373de5e25361ae44 SHA-1: b3d06aa37f98f49505dd7685e0a6c69dd897adaa SHA-256: 951dc89c86432792bf747b3155c7a5e302c29f40f18aa530b5e7f26bc174721c
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results for PDF downloads, with the primary link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains the same suspicious URL. This indicates a phishing or malware distribution attempt using a deceptive PDF lure.

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=shrimad+bhagwat+geeta+in+gujarati+pdf+download
    • http://rozonez.manilges.com/uploads/1/3/2/3/132303382/3fed7880.pdf
    • http://files.escondidotreeservice.com/uploads/1/3/1/4/131452771/tasov.pdf
    • http://zasetuda.sayurihayakawa.com/uploads/1/3/0/8/130814328/9233839.pdf
    • http://files.fancyflipevents.com/uploads/1/3/0/8/130815137/2578968.pdf
    • http://files.longearssafehouse.org/uploads/1/3/0/9/130969176/04ad0e6c.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/52590643886.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/rewilopumofelokeludu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/biochemistry_of_fruit_ripening.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0552/files/riberivaxadib.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/66938702465.pdf
    • https://cdn.shopify.com/s/files/1/0436/6172/1765/files/algae_classification_and_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/54956053447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/rujesuxubupabigaxowemabod.pdf
    • https://cdn.shopify.com/s/files/1/0447/5568/1431/files/senior_linux_administrator_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8605/files/bajaj_ceiling_fans_catalogue_with_price.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/bharathidasan_university_ma_english_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/27760576693.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/mijaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/87900445592.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_off00006204.bin
32ec142831e2a0a5aa1ac79d29deaa4022b43e20779249e194189528aaf33d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 5688 bytes
font_01_sfnt_off00007549.bin
53e1f6bb595ad98732e10346d8a8e27fc8185384f17ef3d77dcc5254fbe75660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 6848 bytes
font_02_sfnt_off00008b89.bin
ff09261a46f44cfa18de223853fe5913d7c4b93ef379f7bb503ba6baeda8e7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B89 10144 bytes

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