Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db849de7fcc6b76…

MALICIOUS

PDF

49.1 KB Created: 2020-08-02 07:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fab99ddf738cf4a708117fe246f577fc SHA-1: 5f9bc29f6c0ec8f584ed6f8fb94f2be3356fa0de SHA-256: 9db849de7fcc6b76327f5e583d2a705e2706511b5368d4e549d7f89ac780a2ab
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though partially obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=phil+of+the+future+episodes' which is likely intended to redirect the user to malicious content. Additionally, the PDF hosts a large number of other PDF files on Shopify domains, suggesting a link farm or SEO poisoning attempt to improve search engine ranking for malicious content.

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=phil+of+the+future+episodes
    • http://files.turneraviationfremont.com/uploads/1/3/0/9/130969865/bokedifu_xukiwo_jejivikom_loniwilukusove.pdf
    • http://files.pricklygal.com/uploads/1/3/0/7/130775921/kevise.pdf
    • http://files.victoriawaterfronttours.com/uploads/1/3/2/6/132682039/fabovemo-vozaligim-mabubumusugu.pdf
    • http://files.greenvilleairbnb.com/uploads/1/3/1/8/131871871/96fa085.pdf
    • http://files.sevensisterscameraclub.co.uk/uploads/1/3/0/7/130738912/wonevurewo-xukexopete-doweralojedowej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/jivizuwiwitaber.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/19659092490.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/34011522767.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/kosoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/puderifuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0224/files/dwarves_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/letajirawadorixogesetefim.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/69587295755.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/66611961734.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/85958883478.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_off0000843f.bin
c99c5b1fc038e5a2d02ad434c8eb1db069fe73853b01bc6262f8a3430c40bff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843F 4920 bytes
font_01_sfnt_off000094f8.bin
d0b499059f47267e95c62410267a2cd25e5f9987c6d25b7ce8195d6c3cd3c7a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 10008 bytes

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