Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb36ab4513be7241…

MALICIOUS

PDF

38.4 KB Created: 2020-08-14 03:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8d41ead59e7ac5ab7119a76d1e6c455 SHA-1: c162a8cd40cda61bee4ed493f5d542ad7ded3659 SHA-256: eb36ab4513be724127eedc42ca4c67084c718cc5809ef6e8a880951b04807d28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Bahubali 2 video naa songs telugu', suggesting a lure for SEO poisoning or phishing. Another heuristic indicates a PDF link farm, with the primary link pointing to a Shopify domain. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=bahubali+2+video+naa+songs+telugu
    • http://files.hrmis.es/uploads/1/3/0/7/130775249/mujobedejexakodabux.pdf
    • http://jafosa.robertomiatelloarchitetto.com/uploads/1/3/2/6/132681218/6240723.pdf
    • http://files.peterandpaulapixie.com/uploads/1/3/1/3/131384340/pubabekezimulim_fazegelop.pdf
    • http://files.monasfamilyemporium.com/uploads/1/3/1/8/131871745/xofozudule_funuzuxap_saluxude_fepumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/kalinix.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6195/files/agile_software_development_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/2775738479.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/what_is_foreshadowing_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/ecological_niche_modelling.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/d_d_oathbreaker.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/muwefumabatid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/anaerobic_digestion_of_food_waste.pdf
    • https://cdn.shopify.com/s/files/1/0437/5075/2417/files/33858692124.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/pisakejo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/wewimukubebuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/2444/0729/files/39721405451.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005877.bin
0b0484b3bad204c78435069aea144e1aea305d7bfdff69a2254739f9d9b75380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5877 5372 bytes
font_01_sfnt_off00006ab9.bin
c6ca6dd05b3a72578d8c3b9cfd591d3b6eb81edea3e03e4d88befd488088e910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 9928 bytes

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