Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8e78154ba52ef8…

MALICIOUS

PDF

33.5 KB Created: 2020-08-14 03:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a225234e9677655136661f948ebcaf88 SHA-1: 490f1b0ca2265943b59428ca1d8642ed2c0aef85 SHA-256: 7f8e78154ba52ef8b988f52d231cae9ab846afdb1d0240e6ba0999a0ee3dbbf2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination and evade detection. The document body, though heavily obfuscated, contains text related to a 'beauty app' and multiple URLs, suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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.cc/pify?keyword=beauty+app++karna+hai In PDF document text
    • http://files.charankainth.com/uploads/1/3/2/6/132683080/f62e64c6bf49c3.pdfIn PDF document text
    • http://fepelipuz.knotyourgirl.ca/uploads/1/3/1/8/131855997/nitaxefuwaxu_mumifazonoxem_majid.pdfIn PDF document text
    • http://files.aurorapanonica.com/uploads/1/3/1/3/131379296/mupexuxoxoke_gekasu_bisur.pdfIn PDF document text
    • http://rezowus.palatinereview.com/uploads/1/3/1/3/131398345/1458360.pdfIn PDF document text
    • http://files.eperformancetherapy.com/uploads/1/3/1/8/131871535/eb2f0efd3e4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/rome_bus_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/zafawukifafifikixubel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/51942538820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/44468432925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/canyon_burger_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/35712166360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/53847048798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/26439582993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/sesebixatoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/methods_of_waste_disposal_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2175/2726/files/mamivusamojogikusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/wuxorizame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/1517029203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3407/0440/files/jagivovilutabexinalori.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f3.bin
b33bdc8d5619440284fc94fba8217060ba65510438a37147597471f6b243c7db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49F3 4912 bytes
font_01_sfnt_off00005aa8.bin
5b95795dba58b52a744728cc5c7c856c0c21115e6962b913b7f15b30664dc387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA8 8860 bytes

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