Malicious PDF — malware analysis report

Static analysis result for SHA-256 43752857fcb00350…

MALICIOUS

PDF

51.2 KB Created: 2020-08-09 10:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 280237dde9c661f709940f8c78db5eda SHA-1: cd03c0872993e3d957bb91d3779c2082a70e98e3 SHA-256: 43752857fcb00350c97c4ba78a7b79d06a8a5b3ab610c927615f454c3a36c52c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to 'printable archery target pdf' and includes the malicious URL. This suggests the document is a lure to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=printable+archery+target+pdf
    • http://files.kateyeungdesigns.com/uploads/1/3/0/9/130969220/1556579.pdf
    • http://wilom.smwa-cloudcroft.com/uploads/1/3/1/4/131453133/e30f8e18f3b.pdf
    • http://files.jindabyneyabbies.com.au/uploads/1/3/1/0/131071067/06eec70efb.pdf
    • http://files.lynnjohnstonlit.com/uploads/1/3/1/0/131070674/fomafelaninezimimov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/siralozaweb.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/how_to_know_if_vpn_is_working.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/6814434599.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/24689843437.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/4095568413.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/64597961671.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1846/files/vampire_the_masquerade_anarchs.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/37333701820.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/80783869722.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/15946644690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/lowes_philips_hwy.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_off00007db9.bin
70cf7c16d280343d34a5ab5d892aa8b1e902a2389c664675720cad35fd3b78df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB9 5160 bytes
font_01_sfnt_off00008f36.bin
df8047aa64346d3e878f09f437cce1e680294088436638d98368dcab600b71ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F36 10384 bytes
font_02_sfnt_off0000b1e5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E5 4324 bytes

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