Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6677a0be9156d24…

MALICIOUS

PDF

52.8 KB Created: 2020-11-04 07:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fe0130cf875038b642efe3620e65a01c SHA-1: da7ab3d0dc1ccebe855a22bac4469774a770d605 SHA-256: a6677a0be9156d24e57521f27548b2d0284ab845cbcdc0484056d9dbb02d07eb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link disguised as a search result for a product, which is a common social engineering tactic to entice users to click. The link points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a malicious site, likely 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.com/123?keyword=hoover+garage+vacuum+wall+mounted In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f913dac742a0.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/8448799.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/kinivetexubomeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f98c7265e6a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c95ae1f-3c3b-4e9c-af70-877adaad75c2/wuvofulos.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/creative_writing_year_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/bolisofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2fcc31-9c4a-4b40-83a5-103546a23331/37431520960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd49c48-a4fb-4926-83ed-c615f512be49/vexopi.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/guitar_hero_songs_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e291fd-664c-4dfc-b965-42305fd3aab4/bat_house_plans_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7312184-81c8-454c-80ce-0c136f6452ca/47458841948.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_off00008f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F73 5192 bytes
SHA-256: 5c815345ad43a80af869ceab7e66398248ac622794a3b8527ca7c8f528aeac93
font_01_sfnt_off0000a11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA11A 10988 bytes
SHA-256: d151a2d04edc70e0c51a844f88388f203f3fdb23b2b5d43045b7036836b08553

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