Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd57807b554b288…

MALICIOUS

PDF

44.3 KB Created: 2020-08-12 11:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28ce7c56412c41c25f4af2f782f0d23 SHA-1: 989df9d1b2a04fbf8c6b6ac3ae14c53d143cae6e SHA-256: 0cd57807b554b2887cfdb81cea649b46dcaf01e2972fce5d6541e7284ea5b0f3
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text that appears to be a lure related to a "case in point pdf full", and the embedded links are likely intended to direct users to malicious sites for phishing or malware distribution.

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=case+in+point+pdf+full
    • http://files.mamatgear.com/uploads/1/3/0/7/130775245/resatid-kenetanimaxada.pdf
    • http://files.cedarseast.net/uploads/1/3/2/3/132303147/5457895.pdf
    • http://peweg.sunshine-learning.com/uploads/1/3/1/3/131380600/jegesarufux_kibeloririnez_rojurox.pdf
    • http://files.shopsoutherngristbrewing.com/uploads/1/3/1/4/131406610/jejuzop.pdf
    • http://files.joeprofita.com/uploads/1/3/1/4/131437937/denatexisaba_pumanomab_nexoto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8999/2616/files/46626389011.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/nikesezaxetutavebubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/zujotaxobebularizetun.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/vupasalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/openstax_college_physics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/obc_caste_certificate_form_rajasthan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/puleruwixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/something_anything_someone_anyone_somewhere_anywhere.pdf
    • https://cdn.shopify.com/s/files/1/0440/6676/7013/files/sds_holland_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/download_music_from_myspce.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/rigveda_samhita_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/16094433029.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/titefasametamaz.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_off000071bd.bin
7d834a73aa132309c409e43f33278fcc64cacba58c7716e58668bb0e2d8067e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 4844 bytes
font_01_sfnt_off00008246.bin
0f6d7346ff407230561f8cba013fd1730b96917a6310cf01eb9a1367b0547490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 10072 bytes

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