Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a09b1928d0c2074…

MALICIOUS

PDF

56.4 KB Created: 2020-08-08 04:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d59bc8e4114039ebac6a5fca4093fb5e SHA-1: cb8b84618558e1f7e27a82e43d47422d3f1ae0d8 SHA-256: 8a09b1928d0c207453acc6acca4c5ab192d472b659ff990d21777c73a85c3cd3
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=ocean+basket+sushi+menu+south+africa+pdf+2020'. Another critical heuristic identified a PDF link farm, suggesting the document is designed to distribute links to other potentially malicious or SEO-manipulated content. The document body, though partially corrupted, contains keywords related to 'Ocean basket sushi menu' and the malicious URL, reinforcing the lure.

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/pify?keyword=ocean+basket+sushi+menu+south+africa+pdf+2020
    • http://files.loveforlocals.com/uploads/1/3/2/3/132303351/dosag.pdf
    • http://files.mysuperiorautogroup.com/uploads/1/3/1/3/131383342/tufemiximokolawumero.pdf
    • http://files.climateweekaberdeen.org/uploads/1/3/0/9/130969772/9a3f14bd0a6ec.pdf
    • http://files.fgfvegan.com/uploads/1/3/1/3/131381414/66b1a3377c888f2.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/xuwiman.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/92273061305.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/witosowezawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/album_search_img.pdf
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/82018493807.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/36786446310.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/april_2020_current_affairs_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/6645514670.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/bepavudupetexinoxewis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/zelirebalage.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/nupetazup.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/90314152856.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c11.bin
3f2c5927874ad1578b584decdf286d9d7bb32e7bf3bbac24e9a9b643ca669270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C11 5868 bytes
font_01_sfnt_off00007fcb.bin
d64340b15287c056ecc73f7633c35ed589b75f78d9041c43f06e2711d127cdd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCB 2284 bytes
font_02_sfnt_off00008a0a.bin
1cc5f324c1d4647aa9adce3b2b89da449f4b3bf4b7fe96901fed781aa780ce11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 15712 bytes
font_03_sfnt_off0000bb94.bin
6ec229c24529a358c131ee313581d0f07f65b4fe3555c9b3ede32f1fcfcfb813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB94 16880 bytes

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