Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db7831f8bb8d70a…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 00:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d7eff9666052d0f330e15697206a23 SHA-1: fde3793e6f9a359681220b19d204cfa98c1793ed SHA-256: 2db7831f8bb8d70a8ba207c242c85a994deb74b11316cc89ba1e785d1a939240
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as a search result for educational documents. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=ignou+b.+ed+entrance+result+2020+merit+list+pdf
    • http://files.our-lady.org/uploads/1/3/1/3/131383743/xijupokexazopoxinuvo.pdf
    • http://files.friendsofastrology.org/uploads/1/3/2/6/132681384/5652f4.pdf
    • http://files.greenelkrapids.org/uploads/1/3/1/4/131406086/4471259.pdf
    • http://jakumixux.azcarpetinstall.com/uploads/1/3/1/3/131383544/putejemovebil_kesof.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/cobalt_ore_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/maxazazerar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/tovafazaterefiwotegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/botibepod.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/24_season_2_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/14936219921.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/nutrition_during_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7642/files/97721178774.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/85156136497.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/kerizepevoxokepalaguzemez.pdf
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/arthur_schopenhauer_biografia.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_off00006ea9.bin
6f9e1a02c9d4a0219bb8b65a01d02d120a18d9b2ab7990b6afa18bb4725ec5ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5860 bytes
font_01_sfnt_off00008284.bin
50fd13050c798ebf2024afc217bce1d752e8d3a806b75978bb16c652c61f4a1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8284 10244 bytes