Malicious PDF — malware analysis report

Static analysis result for SHA-256 7694752d9502b294…

MALICIOUS

PDF

35.5 KB Created: 2020-08-29 21:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 914d95d3b91051d810d549d9c0c10f5d SHA-1: 66b441c000574f4897147671bf96112d962b8b74 SHA-256: 7694752d9502b294338468add56448358f5464df9c81509833bfa5afa6b5d6b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service identified as malicious. The document body, though partially corrupted, contains text suggesting it is a lab manual and includes the malicious URL. This indicates an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=lab+manual+for+andrews%25E2%2580%2599+a++guide+to
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9cc572_4ecebe473d1e4b9ea8b2fd1a6cf38427.pdf
    • https://static.usrfiles.com/ugd/b8c837_de8101c28447443aa733ff3c6c638ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_574478db8c164d8684529770df75ca34.pdf
    • https://static.usrfiles.com/ugd/7ff653_83666340b35042eca041eeeea1f5fe4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/nutrient_agar_merck.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/78413073240.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/83966627825.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9580/files/sds_sheet_for_scrubbing_bubbles_bathroom_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0439/6072/9758/files/r._e._m._albums.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/96179658642.pdf
    • https://cdn.shopify.com/s/files/1/0436/2590/6336/files/noginowinaxobajekakezatif.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/1616704443.pdf
    • https://cdn.shopify.com/s/files/1/0462/3800/7456/files/94282082055.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/red_chinchompa_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0462/1392/2970/files/61695246635.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5765/files/halo_ce_cracked_multiplayer.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/79285694838.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8b.bin
6e9df41367acea2f9b0f7386c1f38515928295d8f16836b63a11f699ed2fd9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8B 5452 bytes
font_01_sfnt_off00005d19.bin
0ed29e0e970e89573e6ce224b85c43b149f749778237b8618ddfdf97acedc94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 9892 bytes

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