Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbda44a750d4b92…

MALICIOUS

PDF

38.0 KB Created: 2020-08-20 02:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7aa1a4b6ccad91cc060cfad5a44354f SHA-1: 727fa2eeb069e7146bf6a665248734f9c37a195e SHA-256: 5cbda44a750d4b92e624a92976a815ba4b3547aea8e289fa08d9a5972ff30610
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for users interested in 'Galactic explorer for merge cube'. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

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=galactic+explorer+for+merge+cube
    • http://kijige.sikhsaaj.com/uploads/1/3/1/3/131380429/46e4d643.pdf
    • http://files.dedhamcampfair.org/uploads/1/3/0/9/130969986/jiwisuxoridadovon.pdf
    • http://files.leescrossroadmbc.com/uploads/1/3/2/6/132682970/volagikulox.pdf
    • http://fofezexa.helgadeasydance.com/uploads/1/3/2/8/132815172/473454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/37890134760.pdf
    • https://cdn.shopify.com/s/files/1/0438/6534/2117/files/tadurajimixexejun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7154/files/92532735795.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/tirijanixusamosusirabuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/96516328393.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/264203852.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/95109790293.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/jukoxupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/lipurenejulujudune.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/ijazat_aadat_hai_song.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004744.bin
71a7b4ff306c8b58415055cbaa90922b69fc4d7154c792adf72378f0a233c1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4744 5396 bytes
font_01_sfnt_off00005988.bin
e9a5de6f5f2bb43489e319bd7d64a77cccbf5b6c2864257a2ac59b896a22ff3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 6044 bytes
font_02_sfnt_off00006913.bin
0c108b718e7fc5cb821f48800a3e19d794396041ffc7df4d8c3ab1874d108b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6913 9916 bytes

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