Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80d49a7082db08c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 20:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 075f3e8c925ffa5a9edb3e93e77015a7 SHA-1: 405a6751c3b98288e03fe4fb462588bf4133ee14 SHA-256: f80d49a7082db08c94f10861d6fd3d97c0b0a61d0edf92af7f68a34bd0490624
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'crossword puzzle worksheet generator'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=crossword+puzzle+worksheet+generator
    • http://files.sassyknitsbysherrard.com/uploads/1/3/2/6/132681947/lafisogaro_zedezufizulara.pdf
    • http://files.stjohnlutheranonline.com/uploads/1/3/1/6/131606360/2b7245357013cec.pdf
    • http://files.arkumc.org/uploads/1/3/0/7/130776336/087dbfb2.pdf
    • http://files.amandamarkle.com/uploads/1/3/1/3/131381204/da144abc23.pdf
    • http://goxitilot.wildharehome.com/uploads/1/3/1/3/131383813/422183.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/31644929029.pdf
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/totetelupaxijolaxerusok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/jitubudubifimifaditefasuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/zewoladaxige.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/toyota_corolla_verso_2020_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/murixiwalolozupen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/nekevitozewanuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/ashokan_farewell_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/74980566579.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_off00006286.bin
3be3b382a3ea49394095c09317c32c70db7ee00c4c31a73eb9a6a321c7d1607c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5332 bytes
font_01_sfnt_off000074b9.bin
7c941f5ee3c81b006f65ff6479aa6ac57c8e1e3f7aebb3684384c55a49c4d8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 10316 bytes

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