Malicious PDF — malware analysis report

Static analysis result for SHA-256 63178029bd8669ed…

MALICIOUS

PDF

51.6 KB Created: 2020-08-08 13:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 435e88e89ff53ae514d768ba542f11b3 SHA-1: e6a2214639c7e6003d566c222b8b7f89c5b81578 SHA-256: 63178029bd8669ed974f3da03b52b5d535aa8c8c9bcb80f125ac1494fcbe413a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=nomination+des+sous+prefets+au+cameroun+2020+pdf'. This indicates the document is designed to redirect users to malicious sites. No scripts were extracted from this sample.

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=nomination+des+sous+prefets+au+cameroun+2020+pdf
    • http://girif.myelizabethsanchez.com/uploads/1/3/1/4/131452836/6dd521.pdf
    • http://files.mrsheridanenglish.com/uploads/1/3/2/8/132814427/vasov.pdf
    • http://files.petanquepb.com/uploads/1/3/1/4/131454355/zazowagej.pdf
    • http://files.housersmathpage.com/uploads/1/3/1/3/131384071/gixajozozinofi_lemazogatelotax_rufetotipenizig_guraluwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9440/0423/files/benteng_hidupku_chord.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/css_chemistry_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6923/3557/files/57200279449.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/miduzepazimexigitadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/canadian_dementia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/sony_kdf_50e2000.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/90930729472.pdf
    • https://cdn.shopify.com/s/files/1/0429/0723/8567/files/cemented_carbides.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/70272554756.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/93595963543.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/difference_between_aerobic_and_anaerobic_treatment_of_wastewater.pdf
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/water_animals_images_with_names.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_off000085e7.bin
74da838b28b9e83c2486544fdf4963d1f4b27fc4d21b2e1e923c1c732aedccf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 5512 bytes
font_01_sfnt_off00009893.bin
d31e181a3fb7990798b42e5f4db887cbc1663751af04f1387afed7c04dde4e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9893 12296 bytes

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