Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe5009527f18922…

MALICIOUS

PDF

44.2 KB Created: 2020-11-03 02:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5a206ba548cc91127ab6236cd785cce0 SHA-1: dc47eda1c01303f7561f2e87a34f3f4cff750258 SHA-256: bbe5009527f189224fa500ba257af58361e5e7abcde0616754dc44ebd709f251
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/aws?keyword=free+fire+only+apk+download+latest+version In PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/7e679ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9269/5968/files/silver_sonic_boom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8974/1974/files/saxon_math_5th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2347/8179/files/kumulavo.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/33456157163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6566/2357/files/non_current_assets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2fe128a-557b-4df9-a5c5-d9a542045867/tisozugabujamadin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7868/9976/files/mewejabunufos.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jexoratomorakuwisiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0abba8f-2cff-4139-aaf8-347a6fa79820/brisa_retractable_screen_door_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/21030832741.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/concrete_structure_properties_and_materials.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 5096 bytes
SHA-256: 240192718c6420b710d0c36bb13b19055db8d46019161e5b4970ca650066d3e8
font_01_sfnt_off000070a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 10808 bytes
SHA-256: 61aa9021d7cb9881859e7617eb6f246d1c105e0a490f7d2c2415b9557aab3f59
font_02_sfnt_off00009579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9579 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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