Malicious PDF — malware analysis report

Static analysis result for SHA-256 3679ee1fae99fc9a…

MALICIOUS

PDF

43.4 KB Created: 2020-10-08 12:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 492e80e788cf9de67224af4343cf26f6 SHA-1: 00010b4a398fc3a204c233ac08161487006a9dd4 SHA-256: 3679ee1fae99fc9a2608efe41edccd5632d70ae81003b3ce70326c9b329bd6c1
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, suggesting a phishing or scam attempt.

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 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=building+foundations+of+scientific+understanding+pdf In PDF document text
    • http://files.nit.com.my/uploads/1/3/0/7/130739826/lelesowem-fizoga-nisawolif.pdfIn PDF document text
    • http://files.arimasarts.com/uploads/1/3/2/8/132815731/welide-zowadoviz-tifixe.pdfIn PDF document text
    • http://files.metamorphasis.co.uk/uploads/1/3/0/7/130739398/warekoxazuviwawep.pdfIn PDF document text
    • http://sanejew.refugeeradionetwork.net/uploads/1/3/0/9/130969644/lotovezufixeniware.pdfIn PDF document text
    • http://files.northcountrytaichi.com/uploads/1/3/1/3/131398473/ledewevevaza-jogoli-demitatexefibez-jazavewinira.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/dakugefesiwo.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/pokuzowi.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/38729158425.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/jamon.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/83247037813.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/a87f1ae5-8d98-486e-9913-2c6ef7f78173/nifosakovidifojadot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd4b5be-745a-4dbd-a1a0-044302ead02f/15924256515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d93e099-8d1a-4190-be1b-3920fb37f5f8/temazogekujaratepitaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5119/9895/files/lowes_power_inverter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5303/8749/files/19972199759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/the_butcher_of_anderson_station_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2730/3080/files/evil_dead_fistful_of_boomstick.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_off00006aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA5 5372 bytes
SHA-256: 870dab3f0e0b2faa32517f00e835a68392ccf8017bdf6a90230040c846772c9d
font_01_sfnt_off00007d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 10180 bytes
SHA-256: e680898c9696787491fd5ef92c38cb411827e880edaf8d2c151896c685969aa7

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