Malicious PDF — malware analysis report

Static analysis result for SHA-256 1958b27a7a0b20f5…

MALICIOUS

PDF

41.5 KB Created: 2020-08-17 13:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dfa48dc41c24a6fcbea5a1fa4d846ab SHA-1: 4fed981e69ce78bab61364ed9a57d336616aa5bd SHA-256: 1958b27a7a0b20f5808fb7e4a03aff7813750bb4640dc3685f68447dd55aad9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as 'Folklore the affliction character sheets'. This suggests a phishing or malware distribution attempt. The document also contains a large number of links to PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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.cc/pify?keyword=folklore+the+affliction+character+sheets
    • http://sutixas.amomisborn.com/uploads/1/3/1/8/131857054/9138026.pdf
    • http://files.chefdavidbmorrison.com/uploads/1/3/1/3/131398224/5779367.pdf
    • http://files.glotanningandhair.com/uploads/1/3/0/8/130874075/3465056.pdf
    • http://kenetadu.mcjpgs.com/uploads/1/3/0/8/130873791/7324029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/53481901873.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/92240135810.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/14704645582.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/snake_mania_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/jurnal_bioplastik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/25114451610.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/9005/files/gumulil.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/hiv_aids_signs_and_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0440/6103/2598/files/rigexaxelos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18608783112.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/12555053714.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/duveve.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bfb.bin
bac840a83228ad68dc505440f59e8d57c68dc1de8f2c82faa488f591c67e444b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFB 4988 bytes
font_01_sfnt_off00006ce1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 1800 bytes
font_02_sfnt_off0000756e.bin
27e0686e82502a2845cf6f02e5c765ff9473c61f0a20a1ec703ec3e3156bffbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 10368 bytes

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