Malicious PDF — malware analysis report

Static analysis result for SHA-256 69240ea729d3ef82…

MALICIOUS

PDF

64.2 KB Created: 2020-08-10 23:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eec595bd148f73d4dd0ae2ce70ea2da SHA-1: d51837d3341f622477e8e1adb27fca96130c3cbc SHA-256: 69240ea729d3ef82463a470a93034475e1c4b6e58edd1a0458bcbd2e165a0b7b
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 external PDF files, suggesting a link farm for SEO manipulation or to distribute malicious content. One prominent URL, 'https://ttraff.cc/pify?keyword=water+pollution+project+in+marathi+pdf+file+download', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, indicating its central role in the attack. 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.cc/pify?keyword=water+pollution+project+in+marathi+pdf+file+download
    • http://files.ourlittleoutdoorclassroom.co.uk/uploads/1/3/1/6/131636655/najiz_ledunu.pdf
    • http://files.prigitalsolutions.com/uploads/1/3/1/0/131071076/577897.pdf
    • http://fodev.riovistaresorttx.com/uploads/1/3/1/4/131437462/8db93f41f52671.pdf
    • http://gipiv.alliumresearch.com/uploads/1/3/1/8/131871921/6366757.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/ccsp_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/40731647022.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/zatujosejapevabiwanimok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/how_to_setup_a_discord_channel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/asterisknow_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/8730799250.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/sinedatezunozoratasojarow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/bncc_educao_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/88708180619.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/tigonubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/87453075983.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/elisabeth_badinter_l_amour_en_plus.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_off0000bd9e.bin
56684926100a0d966bf29d61ab0afdf916ba332023f574e1f8059dd6df980bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9E 5396 bytes
font_01_sfnt_off0000cfe6.bin
6b3be2353815c5482766c81a7a2de3da87aa93774e47292f3922503f8f73f458		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE6 10336 bytes

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