Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb54b756e176ebc…

MALICIOUS

PDF

47.6 KB Created: 2020-08-07 04:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d14a445d97fba4c290a2e84c28a200a SHA-1: d1acd36ecb08d3d0c1cf0d47ac91ca2913a4e8e4 SHA-256: 3fb54b756e176ebc868d11bd29c3fb2bbd523596083cf68b636acd4ba2d7aad9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.cc/pify?keyword=vimana+shastra+pdf+in+tamil'. This suggests the document is designed to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample, but the presence of a malicious redirector implies a phishing or social engineering attack pattern.

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.cc/pify?keyword=vimana+shastra+pdf+in+tamil
    • http://nogogego.bloomcreations.ch/uploads/1/3/0/8/130814058/1344735.pdf
    • http://files.cbpencil.com/uploads/1/3/1/4/131438464/xobezuzozet_rodilesiludu.pdf
    • http://files.flokku.com/uploads/1/3/1/3/131380183/lufavo-xanaderefimaxe-tibelet-jilebepes.pdf
    • http://files.cayf.org/uploads/1/3/0/7/130738644/vuradis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/saturday_night_misfits.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/11569390360.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/64405506009.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/remove_punctuation_from_a_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/welimejufififaxojonatof.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/zuleduzavuwaraminot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/kigejezumoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/how_to_change_background_on_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/futakunezolurad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/jagamukifalokofix.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/7604784436.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/world_war_hulk.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_off00006fea.bin
5b687e81437e1903e926fe814ae660ca64fa62766778f1c07576a490faa4a3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEA 5244 bytes
font_01_sfnt_off00008195.bin
d94990012b164f24fd5d4842d85059d23de69ce0f8c455a43ff3261260a6b948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8195 10176 bytes
font_02_sfnt_off0000a4a4.bin
a92e414578725acd7fd359c8ee621af43ad08129b8b75c742ed0275996659296		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A4 3336 bytes

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