Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bbf9387901819e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-13 23:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e892ba9b94ae82548c8d4f3a69dcf01d SHA-1: 5c9e07c8602b1c8074e25bcf9c627d77371d9114 SHA-256: 42bbf9387901819e569b0dc4734a7bdda9bc1ec2244c4fb90486a89f7a96e408
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ifpi+digital+music+report+2015'. This URL is likely used to lure users into downloading further malicious content or phishing for credentials. The document also contains a large number of embedded links to PDFs hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=ifpi+digital+music+report+2015
    • http://files.lynnpetersongallery.com/uploads/1/3/0/7/130738988/5990471.pdf
    • http://files.cliftonclimateaction.org/uploads/1/3/0/7/130775196/velajugawi.pdf
    • http://mogixesa.nateveorganic.com/uploads/1/3/1/6/131606289/jivurir-banopore-ranugakixanapuz.pdf
    • http://files.allisonevansphd.com/uploads/1/3/1/3/131397973/daxefanijagarawejog.pdf
    • http://tifoviras.tconlogandesign.com/uploads/1/3/1/3/131379174/3f73c43d8115b4.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/aulularia_plautus.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/95189258493.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/tefal_actifry_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/addressing_mode_of_8085_microprocessor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2458/8701/files/78593158407.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/titekupenujidip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/mulepidetoxuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/arihant_maths_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/kusaxebanixomilasuwuvaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/dilal.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/49091241251.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/89684510737.pdf
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/apostila_para_aprender_alemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/voxagaxitilopogejivibun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f7.bin
5e83078d39ec1b07f155a0387fb3403988ed3bd5e5cad2013e0f3704f9a8ff78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F7 5640 bytes
font_01_sfnt_off00007830.bin
d751021c72c670c01c0650b5aa5e04da93768f41a92a2f28b516388df4dea587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10232 bytes
font_02_sfnt_off00009b14.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B14 4324 bytes

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