Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f814199dd51aa2f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 16:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edd205bf1364ef5bc6a518c3df90b63 SHA-1: 0a8c15c150eeacdbe7d42afe4e5bfa4cd4bba7e1 SHA-256: 0f814199dd51aa2fe1d9c8d0e5f5367e9be0da32e8e314ec34147b2302dbf98c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The primary redirector URL is https://ttraff.cc/pify?keyword=sinusitis+bacteriana+aguda+pdf, which likely serves as a gateway to further malicious content. The sample's structure and the presence of numerous external links suggest it is designed to act as a link farm, potentially for SEO manipulation or to distribute malware.

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=sinusitis+bacteriana+aguda+pdf
    • http://files.galitfriedlander.com/uploads/1/3/0/7/130739621/8887277.pdf
    • http://files.macherieparties.com/uploads/1/3/0/7/130739509/revij_demawula_risiviniru_nifokatun.pdf
    • http://files.michaelshawuk.com/uploads/1/3/1/4/131406448/sofar.pdf
    • http://files.seymourwildlife.com/uploads/1/3/1/3/131398008/kasotip-novikosevinu-zosemaxod-videxupabegel.pdf
    • http://files.piperlewine.com/uploads/1/3/1/0/131071289/4eaf3cc3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/lunibapasiromozar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0103/files/wazarufora.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/14105025815.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/download_al_quran_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/engineering_economy_16th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/52572403821.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/300_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/27571104472.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/menakajejepor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/algorithme_cours_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0440/6670/1477/files/shear_force_and_bending_moment_diagram_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/61916718480.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006878.bin
30378b30f6ebbffbd15753bc04d4a775b71d057adeea4bcfbee6ca520844a6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6878 5532 bytes
font_01_sfnt_off00007b53.bin
f2887326a2e699d8a1205aebfe65ab7d93ac4a29cac25f8aaffe1ce93c7d7fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 10088 bytes

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