Malicious PDF — malware analysis report

Static analysis result for SHA-256 b894b43c2a01c6d0…

MALICIOUS

PDF

62.2 KB Created: 2020-08-09 06:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934338a17e3ac04dea0a6204cb15315a SHA-1: 31bebdbe5d1959369e4f6a4f82eb39c2a5804330 SHA-256: b894b43c2a01c6d0067002cfe3de0e1127370da042c3dc274e13c968887a0c07
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=arabic+vocabulary+in+english+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com and various other file-hosting sites. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect users to potentially harmful content.

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=arabic+vocabulary+in+english+pdf
    • http://files.palmettoswingevents.com/uploads/1/3/0/8/130874587/5869242.pdf
    • http://files.mrsteadman.com/uploads/1/3/1/4/131438059/4352516.pdf
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdf
    • http://koruzi.johnmrinaldi.com/uploads/1/3/0/7/130738524/fetaleb.pdf
    • http://pevaros.safeharborpaymentsystems.com/uploads/1/3/1/3/131383664/beronuwigufunoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/xetodomirepunoxitewab.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/60121633489.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/37249891555.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/53327750970.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/online_ebooks_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/21073377205.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/74303014445.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/les_60_aliments_les_plus_riches_en_potassium.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/les_animaux_fantastiques_livre.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7927/files/tipos_de_valores_morales.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/sofejalesugepaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/lugekubagegakobisenug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/55358300523.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/anemia_ferropenica_dieta.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/
    • https://cdn.shopify.com/s/files/1/0430/35

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b4cb.bin
937ff61d7b55b0c65d9b3e7cdd7303f6c1ec5e2067a5d9f755bb0df8ace867d7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB4CB 31020 bytes
font_00_sfnt_off00007449.bin
88699b54a8ed29c843364d559800d1dd3d68504063f892ded85cdbad44b8842b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 5708 bytes
font_01_sfnt_off000087bc.bin
4609b66551ba41c5ce1fb9d304506a3d780153b72a99c5e39fdf4776d190dcf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 14736 bytes

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