Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9f949b1529d4db…

MALICIOUS

PDF

48.2 KB Created: 2020-08-07 02:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2fa7e2b3628194643b118c1c038cdf SHA-1: 872c4e722ecd8ca8fec79a4e6da9e714b02e3037 SHA-256: da9f949b1529d4db6aef3514eebe604b16af219f18e47874a6f556b59b552953
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a significant portion of which point to a link farm hosted on Shopify. One critical link directs to a known malicious redirector at 'ttraff.ru', which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'flirting questions to ask a girl pdf', suggesting a lure to disguise the malicious intent. The ML classifier also 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=flirting+questions+to+ask+a+girl+pdf
    • http://files.nanolab.info/uploads/1/3/1/3/131379749/befuraxigufero.pdf
    • http://files.thomaswasson.com/uploads/1/3/1/6/131607019/7891338.pdf
    • http://files.montdeoliviersleglisededieu.com/uploads/1/3/1/4/131453943/1145d5e5cf2296.pdf
    • http://files.evolutionbjjpetawawa.com/uploads/1/3/1/3/131398406/711755.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/robaneduxexetetinunujox.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/antologia_de_cuentos_hispanoamericanos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/89973774602.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/emergency_care_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/6415011720.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/lidozarupegilisurimevabu.pdf
    • https://cdn.shopify.com/s/files/1/0449/2250/3323/files/sample_welcome_speech_for_an_event.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/76774105190.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/10595791633.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/37384667367.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/57469748576.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/zekajosolis.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_off000068ae.bin
aae84177217e1e730cd243ce4575c7dc2b98011ff6c836e1fed69a8755d09f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AE 5356 bytes
font_01_sfnt_off00007af5.bin
18ad21356ae95504b6a1b399690fb0e58de11b264f2aac073ee2befbd84e2d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 10008 bytes
font_02_sfnt_off00009d68.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D68 16312 bytes

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