Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e54e08cd31deff8…

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 06:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a4fe990690e6b652b462d1a6f758a5c SHA-1: f7fe5c70b3335b07bf3660ac0a784d545178a1f7 SHA-256: 4e54e08cd31deff8de7e6c13e2d740bb102fb2a8e0b84cc18b7e64f3176c5892
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to a '2015 mustang gt manual for sale' and embeds numerous links, with one pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, but the presence of the malicious redirector URL and the link farm heuristic suggest the primary goal is to redirect the user to malicious content, likely for phishing or malware distribution.

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.com/wb?keyword=2015%20mustang%20gt%20manual%20for%20sale
    • http://files.topenergythai.com/uploads/1/3/1/4/131406075/5471274.pdf
    • http://files.objectsofdesireuk.com/uploads/1/3/1/8/131871614/jovewozisiduw_pofejewuruvipub_bexekaz.pdf
    • http://files.primaverapreschoolatl.com/uploads/1/3/2/6/132682892/pemipiruteduvo-nodegijake-jivalimim-mofimajasul.pdf
    • http://files.seenbyc.com/uploads/1/3/0/8/130814110/mesojagumixewanegix.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/47672117191.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/jujigajesoposokemiroge.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/94342826934.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/kivosodugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8695/files/xerukepesisidabito.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/mipefifusarodeme.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/aura_libro_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8965/files/trap_queen_download_fetty_wap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/zesuxewefuweremu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/4361417853.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/wifevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/76990445075.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/1820126059.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_off00006cab.bin
e7b7e1c41c3227b54206e69ee4c923021f3c8dd533bd4e967437bfd7d1c35205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 5444 bytes
font_01_sfnt_off00007f1c.bin
883e9466b7b760949497233ab24189ab1fca9f402193ae434f2741398711b50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1C 10152 bytes

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