Malicious PDF — malware analysis report

Static analysis result for SHA-256 749a2f9eb99e99a8…

MALICIOUS

PDF

45.5 KB Created: 2020-08-25 01:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06761587b30edc78825dd001530e0842 SHA-1: 1614ae1d24c9322e1d9ed4ed4b3e573742c88eba SHA-256: 749a2f9eb99e99a8a3e4bcc59521972172f7dee76aef76ad9609c22aa877e216
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body text and embedded links suggest a lure for cracked software, which is a common phishing tactic. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms the intent to lead the user to a potentially harmful site.

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=3d+map+generator+crack
    • http://josomug.newlifedirectionsministries.com/uploads/1/3/0/7/130739169/3247943.pdf
    • http://porat.taseelcommons.com/uploads/1/3/1/8/131871721/kenitevamepu-dukawisipozoz-nemigumarok.pdf
    • http://files.exploringourbackyard.com/uploads/1/3/1/4/131438211/litezapili.pdf
    • http://files.steindoodles.com/uploads/1/3/0/7/130739633/23b08da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/ffxiii_2_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/10382098612.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/26671381186.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/43892481717.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/96452908322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/canada_ukraine_free_trade_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/applied_partial_differential_equations_haberman.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/84890873002.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/41913227665.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/20919079897.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/sujadewaxiwanakosonadaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/kopenowewalefun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/70847975867.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_off000064cf.bin
cc4699552af2c75094073a8f0da855ed3ccbe8983494782477b6df99c2bbc65c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 5316 bytes
font_01_sfnt_off000076c6.bin
2e3a019cf6d6aad8d98a2c6db7a63259a7ee0b8e2fd95d148cf8fdd5a4df4e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 17612 bytes

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