Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a49693f78903489…

MALICIOUS

PDF

45.0 KB Created: 2020-10-30 04:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dc222267e9fbb8bffbb5c8e223a36d9d SHA-1: 21e7d0d14c1ed6d37626e24a4698948d10b9eb53 SHA-256: 6a49693f789034893b6dfaf1167a88653626322ee0dfc66de3e4e9e8f926ac2d
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://ttraff.me/pify?keyword=hardware+networking+interview+questions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5f9ab18234ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f9b68fea0f36.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://uploads.strikinglycdn.com/files/90671db9-f444-4b3e-97e2-7caf2959c51c/filinuwatefejitufalak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3900/6113/files/papumumugowuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/64591848304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca090b9-7b51-4389-86e8-3406f0e18f28/japijujufojotolakofadire.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/soninuliwagogo.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/autobiography_of_yogi_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74dd260-7c07-4534-9d06-55548177e0a7/pukeforeropil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f13232-ee65-471d-a2a8-4d1686cb62d2/tijivesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80aaa71-2a0d-4d96-83ac-29c093ad4f38/18526580982.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/xategonuvepinajononiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80038360-48a3-478e-a106-c62656ffb97e/tavosedamizijapumokojofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7051/2040/files/72782687713.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/24536788285.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_off00006493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 5364 bytes
SHA-256: 117fdb7f762cde7fbee7fa7c4322f6169369baa65cd835b86bcf1b87146a46a1
font_01_sfnt_off000076f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 9984 bytes
SHA-256: 97b6642f986ca911149e28dc22c3d8d8dc22367f7e5df0ce59d8e339165afef4
font_02_sfnt_off000098a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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