Malicious PDF — malware analysis report

Static analysis result for SHA-256 347595d4ef629288…

MALICIOUS

PDF

48.3 KB Created: 2020-10-29 09:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 29e3e884eb7c30d81e63605cb39a3c20 SHA-1: 2a7341f7568c2385fd09e19cf40315d22b9c3f19 SHA-256: 347595d4ef6292889625ffacc4c6c68eaf8cbe8aac323e06da2d73dbfe8781b5
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 large number of embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests the PDF is designed to redirect users to malicious sites, likely for further exploitation or phishing.

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/123?keyword=offensive+football+strategies+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_5f9800169ebf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f8d63bcc90f0.pdfIn PDF document text
    • https://fapovodulutob.weebly.com/uploads/1/3/4/3/134361236/f898a304.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/firumiwuvezepo.pdfIn PDF document text
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/povotuwe_remuxirarerag_fimin_jonezedulum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f99460f680d7.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/acd57a60-e691-4732-88c6-9fbe380c8541/wamozinejafexotasekiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/5e_race_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ea282b-e19e-4ca9-b50c-21a4b97fef14/5088120228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efbb84b-3b33-44f9-95e2-e70af0267d81/lafojozoxudebuvewivotiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6388/9060/files/femosepumibunujifep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b85976-e6a9-4e89-8664-ad39ce04ebca/57764079209.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/english_synonyms_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/78549913376.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/mens_shoulder_bags_cheap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9691/5143/files/878070193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a879ba-6044-48fe-a3cf-2ce229684999/91638478186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdbb708-c12a-4e13-a5b3-a35eb0a48219/80589053283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9354/0039/files/can_i_edit_in_ibooks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1610/8210/files/whistleblower_complaint_declassified.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_off0000706a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706A 5224 bytes
SHA-256: c46b20ab4245ffd39454b1b3f5a85ba8c896267552bb8cb49a6ff149aea74908
font_01_sfnt_off00008238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 10432 bytes
SHA-256: c41b487e18e259ec75694ca5e3f98b48120c0f0f603835cb634af9ecb90012d8
font_02_sfnt_off0000a5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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