Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ba4b3d2069eb9b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 12:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49a5f0db73f868c868d1a7166185307 SHA-1: 8668fa908f7a188b4a16a92a3b3f820d8613263a SHA-256: 45ba4b3d2069eb9b430f3e723b3bf7fc230621afd305288d63fa464f12927b70
150 Risk Score

Malware Insights

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

The PDF document contains a deceptive title related to Gmail signatures to entice users to click on embedded links. One of the primary links, 'https://ttraff.cc/pify?keyword=gmail+signature+not+showing+up+on+android', is identified as a malicious redirector. The document also features a large number of other PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure malicious activity.

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=gmail+signature+not+showing+up+on+android
    • http://jobufu.growing8.com/uploads/1/3/0/8/130813840/6522841.pdf
    • http://files.artofinvitation.org/uploads/1/3/2/6/132681882/nurufilunelipiju.pdf
    • http://files.kleensweepllc.com/uploads/1/3/0/9/130969034/pidililuwu.pdf
    • http://fenaz.janeincolour.com/uploads/1/3/0/9/130969306/jidosig-madosujiwotuvum-gusixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/jomogexuvidezeperufalupus.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/sustainable_design_in_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/89335490882.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/mikoderox.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/dadunabaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/cateter_vesical_de_demora.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/betting_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/30_day_ab_and_squat_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/juterol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/43714519108.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/jejoleromev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/72448212077.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_off000060ac.bin
22417322d003d2209a1c00e81d6394106c23e6158a2bc6337005c7605f7d8a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5496 bytes
font_01_sfnt_off0000733c.bin
2317aed022f5653af6f9f22ea12e1cc067abb93f2a3b6b66545b408a8dbc6834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 9780 bytes

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