Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bd7fda9cbd11ef…

MALICIOUS

PDF

41.6 KB Created: 2020-10-20 10:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c2edbc4d594df39434d12b4f4b3c604 SHA-1: 98dbe70b94193681e15541b48de508271625afcf SHA-256: a9bd7fda9cbd11ef9cd393ce623d69335ff4f87278fe940fea89a14ae6dd391c
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.me/123?keyword=bible+stories+in+telugu+pdf+free+download', is identified as a malicious redirector. The document's structure and the presence of numerous links indicate an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bible+stories+in+telugu+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8da711b43a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8b11953d679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f89953fe2bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8e364a3d42a.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/5003d5cbc57e5.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/439013.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/resatet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f8d91291fce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8bc07cacfcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/average_value_and_rms_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/kimemagaxarepejinavij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1586/8063/files/bc548_pnp_transistor_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/backlash_the_undeclared_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2751/1496/files/infinitiv_mit_zu_bungen_a2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c8b749-2efa-4932-b420-e84b41c29c14/44887999713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0956c6f-72d8-41d1-b053-8c299ce5c0e9/vinawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7ddce5-93ce-48f0-ad8c-a0773382e2f2/fasusufagiwifelotakiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671adb02-d624-465c-ab62-d46e48a2774c/74336879480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50f7f1c-b7b8-4334-9c14-0fcbf801833d/tareze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f26b169-17b5-4e74-82cc-f97aa78b51ee/harrisons_principles_of_internal_medicine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6555 5492 bytes
SHA-256: dfdfcb29b0dc6797c19b802ff5b880d8aabf378e6621dfaf0a93739baab00b2c
font_01_sfnt_off00007816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 9556 bytes
SHA-256: 8bdda58d118f8a345a57de8aa6252ea44e9a990436d01a23080ff63d0acb901d

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