Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d414fa829b859a8…

MALICIOUS

PDF

49.9 KB Created: 2020-10-12 05:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 775acbbde66dcf3ae35632cb6a324002 SHA-1: 412a0765ec066129f4c8313f3f78be6830b038de SHA-256: 4d414fa829b859a806ab5e7459dd84e795a5b8580a9cbd3ba6355fb332e01d26
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to disposable hosting and redirect to a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. This indicates the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=1994+mazda+miata+owners+manual+pdf In PDF document text
    • https://site-1042556.mozfiles.com/files/1042556/wiwodixogubafigivabavowu.pdfIn PDF document text
    • https://site-1038970.mozfiles.com/files/1038970/71359394245.pdfIn PDF document text
    • https://site-1037850.mozfiles.com/files/1037850/jafexapupagudu.pdfIn PDF document text
    • https://site-1043618.mozfiles.com/files/1043618/12906891206.pdfIn PDF document text
    • https://site-1043893.mozfiles.com/files/1043893/25264940727.pdfIn PDF document text
    • http://files.thewingedhorse.org/uploads/1/3/1/4/131454316/1314489.pdfIn PDF document text
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdfIn PDF document text
    • http://pexofa.oceancityweddings.com/uploads/1/3/1/3/131383314/busib.pdfIn PDF document text
    • http://files.frachetti.com/uploads/1/3/2/7/132741486/perapajedopoxubipega.pdfIn PDF document text
    • http://fibuxul.premieraestheticshouston.com/uploads/1/3/0/7/130738993/d9298.pdfIn PDF document text
    • http://files.alanhuckleberry.com/uploads/1/3/1/4/131453431/e4c22.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/24a2612f-6ca1-4acb-b99c-386048609724/3806594414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd4f492-5e83-4bb8-aba2-fbbe913b45c3/mefibigibobizunotufule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26b8e9e-6f0e-49d7-93de-6723e776ab38/begidetezidibobotafixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1b001a-dc8a-45a7-b694-a2d420e7b21a/33246062641.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_off000084af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AF 5532 bytes
SHA-256: 0146ec356feeb45da1325634c81f668393d7d1b838e4a4408c1e123b9e21f182
font_01_sfnt_off00009781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9781 10324 bytes
SHA-256: b4b450300d34b53b99ebdb137c6e4fa2af24b1f669fb837ea459fe7680c4d599

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