Malicious PDF — malware analysis report

Static analysis result for SHA-256 0379fa8b82ddeefc…

MALICIOUS

PDF

41.0 KB Created: 2020-10-16 23:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d389aa6bd72568c51a7c65689c82ed7b SHA-1: cb8a728ed1386ae028a71ccf17dabdeb7d129315 SHA-256: 0379fa8b82ddeefce4f1474542c99baa9988a22de5790b214e84ec6cc004eeec
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially for phishing or malware distribution.

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.me/123?keyword=ibm+content+manager+ondemand+guide+redbook
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdf
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/c76c3672.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdf
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/togiluxafik-kipesegeluwedas-juwisoxoweruzi.pdf
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/rinore_vatizevisogopal.pdf
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/2677845.pdf
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f89b4d73567f.pdf
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8938922dbb8.pdf
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f888b4b9d050.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b8ffe37d-b3f9-4934-aeb4-7ea5a7d94668/nujidij.pdf
    • https://uploads.strikinglycdn.com/files/d77b4201-1e25-4751-b5e8-9ee423b344c6/13642006279.pdf
    • https://uploads.strikinglycdn.com/files/22c775bf-fb1f-4335-ba0b-c016650daee8/doxetadurewur.pdf
    • https://cdn.shopify.com/s/files/1/0438/1851/6637/files/mibanuv.pdf
    • https://cdn.shopify.com/s/files/1/0484/4827/4582/files/pavetexinuwaketemid.pdf
    • https://uploads.strikinglycdn.com/files/e4edd2cb-957e-444b-9939-399561b0f5f3/47985760890.pdf
    • https://uploads.strikinglycdn.com/files/6f9d1dc9-67bb-4ddf-85e6-d98971b37a84/vuvozusuzimanimidat.pdf
    • https://uploads.strikinglycdn.com/files/3198eed2-96db-41ea-9929-77114f6b40f4/80174336105.pdf
    • https://uploads.strikinglycdn.com/files/896b1f21-c847-4924-b597-03e67a133975/foniwo.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_off00006122.bin
d32269cd9e72d71d4721ddbfa3e1b7191698dd4cf041d50ca14186bbef4216ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 5192 bytes
font_01_sfnt_off000072a8.bin
547a198dc861867913ac2d65340263c0fc7f6a81bb8040a3a55cd1f83d510e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A8 10044 bytes

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