Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7589152228e751…

MALICIOUS

PDF

48.6 KB Created: 2020-08-03 04:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 485883b3794553002ace1aae954298b9 SHA-1: af395a889d08871f17b729e271fbc651a9fe5879 SHA-256: 0f7589152228e751996beed39c46ca1354bf8ea4e869abff258d1f1fea04ea80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though garbled, contains the same redirector URL and a benign-looking URL, suggesting a lure to trick users into clicking. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=pennsylvania+drivers+manual
    • http://files.twingerd.com/uploads/1/3/1/4/131452870/85babaad49e3.pdf
    • http://files.casa-julip.co.uk/uploads/1/3/2/3/132303353/xugurulotu_karidaxofasor_lufisalaw_gulodaju.pdf
    • http://files.fritosport.com/uploads/1/3/1/4/131483281/tijazi.pdf
    • http://files.fatallyyoursrocks.com/uploads/1/3/2/3/132303181/mamajaf.pdf
    • http://files.cubscoutpack777.org/uploads/1/3/1/4/131406736/saretezewa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/94263539131.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/mivogefoda.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/converting_a_document_to_greyscale.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/37581533959.pdf
    • https://cdn.shopify.com/s/files/1/0436/3619/5488/files/ruzikexuwunenovevifudisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/44437355509.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/discord_markdown_101.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/sedokizim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/xigurob.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/37938897809.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/4013009862.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/92854573466.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fe.bin
5635139f569f616e1f8a3bdce2d224d8b1637fd68ea6ce2e9e9539a84eeb4e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 4160 bytes
font_01_sfnt_off000070b8.bin
6e029a5610d9b8b7741d73d774a0bd5913f4423288d11d230419bb2912bf84c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B8 5136 bytes
font_02_sfnt_off00008223.bin
c424d08cad446c28e8d04ac70c6c07b6c6e6c220831c5c1d4eddcf833d42148a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8223 10256 bytes
font_03_sfnt_off0000a56f.bin
02667d62b18760c8cd56f09d3971da8e945a6b3de4315ae4b9ebf28d26f4f35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 4084 bytes

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