Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1350a84da9c8aee…

MALICIOUS

PDF

33.7 KB Created: 2020-07-10 18:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22fc60aee80442686cf248892ca0e6fa SHA-1: 8ddf8fcd0cb2b0a3fbf082932da1168f4ad98222 SHA-256: c1350a84da9c8aeeb631a83d9cb2f52b0e574624a6ecf57737df7c99468337cb
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a search keyword. The document also hosts a large farm of SEO-optimized PDF links, likely to increase visibility and distribute malicious content. The primary attack pattern involves social engineering through deceptive links, aiming to redirect users to potentially harmful sites.

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/wb?keyword=electricity%20and%20magnetism%20pdf%20download
    • http://files.romaredux.com/uploads/1/3/0/7/130775520/rilolime-xowiwom-mizunixugavij-devib.pdf
    • http://files.jenniferihm.com/uploads/1/3/0/8/130814423/veponakokusi-kovuj-woreforizenavax.pdf
    • http://files.wildaboutspain.com/uploads/1/3/1/4/131407263/feguj.pdf
    • http://files.mvgate.org/uploads/1/3/1/4/131454024/wodunaluwuvuxip.pdf
    • http://files.kelleycarney.com/uploads/1/3/1/3/131379035/4045514.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • http://files.dpbhouse.org/uploads/1/3/2/6/132680915/gosigu.pdf
    • http://files.stmatthewsworcester.org/uploads/1/3/0/7/130738755/365348.pdf
    • http://files.edujustices.org/uploads/1/3/2/6/132695489/befimifiratuzo.pdf
    • http://files.kevinanthonyhull.com/uploads/1/3/1/4/131454383/25a356b6349dc5f.pdf
    • http://files.shopbrolinbailey.com/uploads/1/3/0/8/130813965/8d355d.pdf
    • https://xibelilunaf.files.wordpress.com/2020/07/75570423976.pdf
    • https://zodudawizif.files.wordpress.com/2020/07/96018326358.pdf
    • https://lugiboz.files.wordpress.com/2020/07/45348632037.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/rafamoratij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/luvojovolejowilavikoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/ponojobiwow.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_off000048f2.bin
6753fb2a8df3a4494a7bbd6b26c524879f558c89cffe1795763b378c5699f3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48F2 5416 bytes
font_01_sfnt_off00005b5e.bin
59125c5baa71f051501ccb4920fbdaf1e957a8281db9e6cd75f6bd4164ed6757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5E 8940 bytes

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