Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aad18992e8f0d09…

MALICIOUS

PDF

42.1 KB Created: 2020-07-09 15:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bfa2783c7ccd1bd308e7476b403f640 SHA-1: 0af8ea847c7a4af695fcc65e7020706b26e85787 SHA-256: 8aad18992e8f0d09b9eab4afcd8ea3a675c5b6accfc31a88c808e978205348e8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary link, 'https://ttraff.cc/wb?keyword=nisab%20zakat%20profesi%20pdf', suggests a lure related to professional zakat calculations, likely intended to trick users into clicking. The ML classifier strongly supports the malicious nature of this PDF.

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=nisab%20zakat%20profesi%20pdf
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • http://files.birgittasundstromjansdotter.com/uploads/1/3/0/9/130969294/b9eee389086.pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • http://files.greatcentralwalks.com/uploads/1/3/1/4/131437446/834f7c0bc.pdf
    • http://files.northscottsdaleorganics.com/uploads/1/3/0/8/130813965/5d0048240.pdf
    • http://files.lochgoin.com/uploads/1/3/1/6/131607239/gutexal.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.tonyswartzlaw.com/uploads/1/3/0/7/130776338/69f201.pdf
    • http://files.deltacouncil.org/uploads/1/3/2/8/132814476/buwonilozax.pdf
    • http://files.discerngod.com/uploads/1/3/1/8/131856331/wejawitilitak.pdf
    • https://fosuxexamal.files.wordpress.com/2020/06/vobavuxumagofukez.pdf
    • https://tigizenawa.files.wordpress.com/2020/06/kafelaxopezofagefofeniz.pdf
    • https://xadixijep.files.wordpress.com/2020/06/472111099.pdf
    • https://jumetavumej.files.wordpress.com/2020/07/4166841591.pdf
    • https://pigeliw919772726.files.wordpress.com/2020/06/pewekasijegezanova.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.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_off0000674b.bin
157fa7b115526685b13bd4d785869c9a2bf9bfd432ff483971c72242b9e4d62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 4908 bytes
font_01_sfnt_off00007811.bin
44c4549e804c7aab79e94324d096a81b1ce3bec8f411ad7c7876d3da5c7062de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 10276 bytes

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