Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d378fd734e6063…

MALICIOUS

PDF

44.2 KB Created: 2020-09-18 23:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0622be5ba93c37e3ef26431c988eddc SHA-1: dda836472d49ca22e80b8ef8727540351cfba69e SHA-256: 16d378fd734e60634bf44f619e396eaa85383e31f0a69437a1d4666c2d6cbe3c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm or SEO manipulation scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. No scripts were extracted from this sample, but the presence of numerous external links suggests a potential for redirecting users to malicious sites or downloading further payloads.

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.link/wix?keyword=equivalent+exchange+minecraft+guide
    • http://jajex.ruleof5.com/uploads/1/3/2/6/132681647/9503119.pdf
    • http://xiloji.wildlifeinfo.ca/uploads/1/3/1/8/131871787/vopakumubozeku.pdf
    • http://files.theilounge.net/uploads/1/3/2/7/132712251/riwemow.pdf
    • http://vejeb.youruniverseyoga.co.uk/uploads/1/3/1/6/131606343/6885500.pdf
    • http://veteve.spygamereviews.com/uploads/1/3/2/3/132302978/6b4966ae0a2e86b.pdf
    • http://muwen.stephanieclaus.com/uploads/1/3/1/3/131384240/munifovisoledas-boviwo-mokabaf.pdf
    • http://tovat.nsand.org/uploads/1/3/1/3/131382982/37e0c0fba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://beddd175-45e0-4bf8-a753-1c26513db5fe.filesusr.com/ugd/98e2de_99eb7f5bd52b475d853623aaa5f32734.pdf?index=true
    • https://943e4c57-211a-4569-8e5b-12409bab8c60.filesusr.com/ugd/895bef_28d4b6b0ea6241e4b8468002112730c0.pdf?index=true
    • https://fe1f63f9-aa16-483d-9642-72e7fa53f4f2.filesusr.com/ugd/1ee69b_76b019453f12466c9723634f3bc9e3d1.pdf?index=true
    • https://00287768-27a3-4aff-81e0-cbc9f3173cbe.filesusr.com/ugd/a13bc2_115d987b93714532a130463de3ac807c.pdf?index=true
    • https://a767ce95-425d-4684-ab10-292e4d190e95.filesusr.com/ugd/ade4e6_c7534ded66a44e88bcf1309c8dd63ad3.pdf?index=true
    • https://479f6f0f-9c03-4daa-b029-2d011d3fdf14.filesusr.com/ugd/cb5dea_0cafdd545bbd4db0960408379df72109.pdf?index=true
    • https://dcce16b0-1883-4787-93e6-30f4ed645b01.filesusr.com/ugd/db1da1_090f10ad6de64091a45ff7ff4f8f3192.pdf?index=true
    • https://214a623a-1447-4318-b799-7ce3c8b7b3c3.filesusr.com/ugd/361045_64fcb27fc45a44919935ce98e3715ea7.pdf?index=true
    • https://983cf929-9648-41e5-8210-1524bec50e19.filesusr.com/ugd/01bc73_3630cd998c49498985ba85ad9bb39a06.pdf?index=true
    • 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_off00006e17.bin
a234c3270c384136bff435fa36af81aa14c5f179cc012971be1bd1c7ac9eaf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 5468 bytes
font_01_sfnt_off0000808e.bin
278dc84f88be58bd3a10d97f75e11f38bc70a8dc76245276e292b2c43c6cd647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808E 10496 bytes

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