Malicious PDF — malware analysis report

Static analysis result for SHA-256 365e7cd68d000210…

MALICIOUS

PDF

39.2 KB Created: 2020-08-21 05:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8791d261855f7bdfa6fd4d19139545dd SHA-1: 46f881ad5d49d38116f0b0edb30f8d397a150132 SHA-256: 365e7cd68d0002109ce262a9449fc7d62a9d35e92d574305a623a2f743c6cfe5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=alphabetical+order+worksheets+grade+6'. This suggests a link farm or SEO poisoning technique used to distribute malicious content. The document body, though heavily obfuscated, contains references to 'alphabetical order worksheets grade 6', likely a lure to entice users to click the malicious link. 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=alphabetical+order+worksheets+grade+6
    • http://files.taaa.org/uploads/1/3/0/7/130775971/6252641.pdf
    • http://files.restaurantbeaumonde.com/uploads/1/3/1/6/131636775/bovonejejuvut-zufakurotabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/lejokuzenobezimaman.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/poker_card_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/71429110453.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/curriculum_vitae_formato_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/suzuki_c90_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/10447185319.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/15462815648.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/liwum.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/magezolababemigamovozevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/chicken_bones_mods.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_off00005a19.bin
de7725eff217374119212b757ee0e74cccafa0d7e4b029ec14685174d192ba7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A19 5772 bytes
font_01_sfnt_off00006dbd.bin
aa39ecd9e48df8d265dea8c73366946f690e2f77230394d6dfe8967334fdeab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 10104 bytes

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