Malicious PDF — malware analysis report

Static analysis result for SHA-256 93252bd270a698cc…

MALICIOUS

PDF

36.4 KB Created: 2020-08-17 05:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 435897a05f6ed0a1e8122aa438774964 SHA-1: ab102bbaf53b0b33a67ee6ccbe642866203878df SHA-256: 93252bd270a698ccada6724ca7f854a1248b00b330f0f5f31b300eff6371ab6e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented with a keyword suggesting free coloring sheets, likely a lure to entice users. The document also contains a PDF link farm heuristic, indicating it hosts numerous external links, many of which point to benign Shopify URLs, but the primary redirector is malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=family+coloring+sheets+free
    • http://files.girlsstem.ca/uploads/1/3/2/7/132740362/6956714.pdf
    • http://files.erinredfern.net/uploads/1/3/2/6/132682802/wirawetek_xiradekiw_davuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9689/0785/files/bryant_furnace_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/56339948359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/nobebuzesiwegajafeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nexunalazuzifoginiwaboliz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/banjara_audio_songs_ing_come.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/nobanukuvokigajavutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/56913774590.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/41013870663.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/alexandre_dumas_livros.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/english_synonyms_with_telugu_meaning.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_off00005174.bin
7234afd0d1c0445044fdcb4cc837c60e0fb9f0030a44bfcab6aeff1b44b037c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5174 5352 bytes
font_01_sfnt_off00006388.bin
fe1b1e069e29cb79fb35cd7545c60fe6b99074becaa50a23a5e5621d763f3460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 9852 bytes

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