Malicious PDF — malware analysis report

Static analysis result for SHA-256 625d2f0cef6d5ac6…

MALICIOUS

PDF

45.4 KB Created: 2020-10-04 12:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dbe4f17ede132fa0c8d77c3feb4c8235 SHA-1: f6c7afc09f4523b65d49f2978d2d5831a01e1171 SHA-256: 625d2f0cef6d5ac698bbd02fefb8b7d3b370c1e5c908e0ac458db56d6fad935b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting and redirectors. The primary redirector URL, 'https://ttraff.link/pify?keyword=berns+garden+center+ohio', suggests a phishing or scam attempt by luring users with seemingly relevant search terms. The ML classifier strongly indicated maliciousness, and the structure points to a link farm designed to distribute traffic to potentially malicious sites.

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.link/pify?keyword=berns+garden+center+ohio In PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/xulofupazap.pdfIn PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/fuxumik.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/ditivo.pdfIn PDF document text
    • http://files.iscebs-stl.org/uploads/1/3/2/6/132695347/jogiwetiwuloxuto.pdfIn PDF document text
    • http://files.northposeybasketball.com/uploads/1/3/0/7/130775825/1432873.pdfIn PDF document text
    • http://files.whenlifehitz.com/uploads/1/3/1/4/131452883/fd834.pdfIn PDF document text
    • http://files.dirkvandeglind.nl/uploads/1/3/2/7/132712102/8709621.pdfIn PDF document text
    • http://files.captainjimismagic.com/uploads/1/3/1/4/131406849/7d2f70f1ea860a.pdfIn PDF document text
    • http://files.literacytakesflight.com/uploads/1/3/1/4/131409498/03c0cf.pdfIn PDF document text
    • http://pofusumem.thefaithdiaries.com/uploads/1/3/0/7/130738764/tixuvowawo_tedenifi_sedovexaxelux.pdfIn PDF document text
    • https://site-1041301.mozfiles.com/files/1041301/zilesikerugal.pdfIn PDF document text
    • https://site-1040101.mozfiles.com/files/1040101/xupise.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/92855220129.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/bobadubolenejigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000065ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 5216 bytes
SHA-256: e910d5a38d51bf672979b1779a700c6e0f0e9bdcef547d24aafd77ef99e10f94
font_01_sfnt_off00007797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 2464 bytes
SHA-256: a4819ace0c68aea95bbe756288e19462c7f99d9feecd8c208b1fc591cd21e6da
font_02_sfnt_off00008273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 11580 bytes
SHA-256: eeeccccc92a319d68e1df912508ff0c5b3dabbf53f6258843a5a5eb749993572

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