Malicious PDF — malware analysis report

Static analysis result for SHA-256 608495a8672a8bad…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 23:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2da261516df3b142b24d60374d2c6493 SHA-1: 2a003d3198dd4af14185c9bf937a015f523d3030 SHA-256: 608495a8672a8bad4e3af69c81a56f760d410e3495e5720782923c9bc0423a6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.cc/pify?keyword=oxford+school+dictionary+and+thesaurus+pdf, which likely serves as a lure. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the redirection attempt.

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=oxford+school+dictionary+and+thesaurus+pdf
    • http://files.retroproskc.com/uploads/1/3/0/8/130814078/kelaremibazu.pdf
    • http://getom.my-music-education.com/uploads/1/3/1/0/131070161/jusunuxogego.pdf
    • http://files.sophiascheffel.com/uploads/1/3/0/7/130775261/4953860.pdf
    • http://files.mystiquedogkennels.com/uploads/1/3/1/1/131164052/ac4d49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/kewimolide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/43778469717.pdf
    • https://cdn.shopify.com/s/files/1/0433/7444/4694/files/canterbury_tales_short_summary.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/esp32_web_server_with_arduino_ide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/mirete.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/85414560273.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/44423914348.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/pi_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/napezupadibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/37685872919.pdf
    • https://cdn.shopify.com/s/files/1/0429/3459/9843/files/logback_xml_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/38011693369.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006967.bin
b59d974dc818e141bcf2f2950d72d89714e45e7f5be78ab26a0406a3d8f542d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 5324 bytes
font_01_sfnt_off00007b7e.bin
05b5b3c3b3f8666f702e7e856f72ad76a465efa7c6b8e143eed8a28e9a20db3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7E 10448 bytes
font_02_sfnt_off00009f38.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F38 4324 bytes

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