Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beaee13fad5d0db…

MALICIOUS

PDF

44.4 KB Created: 2020-07-08 18:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4add44761208a084998e1068e061f8ed SHA-1: e8ff4a2e4da30b51991395f9959c93a7b7b5b3be SHA-256: 9beaee13fad5d0db186883a7f4de051c50a7dc82fdf9d72f729dcde9d0b22a9e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to domains that appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though partially garbled, contains keywords related to the Canada food guide and the embedded URLs, suggesting a lure to trick users into clicking malicious links. No scripts were extracted from this sample.

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.ru/wb?keyword=canada%20food%20guide%202016%20pdf In PDF document text
    • http://files.minutemanresources.com/uploads/1/3/1/4/131438840/9130043.pdfIn PDF document text
    • http://files.btozpublishing.com/uploads/1/3/1/4/131406835/kakejited-bisurixubivok.pdfIn PDF document text
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdfIn PDF document text
    • http://files.triplecrownbaseball.com/uploads/1/3/0/7/130775511/6731661.pdfIn PDF document text
    • http://files.ijbmjournal.com/uploads/1/3/2/6/132696263/wuwitegukuwa.pdfIn PDF document text
    • http://files.unclutteredessentialoils.com/uploads/1/3/2/6/132683088/kimatom-nomesofa.pdfIn PDF document text
    • http://files.elwoodpspe.com/uploads/1/3/2/7/132740384/zatuv.pdfIn PDF document text
    • http://files.washington-scottish.com/uploads/1/3/1/4/131406739/1511360.pdfIn PDF document text
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdfIn PDF document text
    • http://files.chrisdreliszak.com/uploads/1/3/1/8/131855992/jabikufogaduvatek.pdfIn PDF document text
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdfIn PDF document text
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rawatereg.files.wordpress.com/2020/06/28274506837.pdfIn PDF document text
    • https://nabukeb.files.wordpress.com/2020/06/suzididavunine.pdfIn PDF document text
    • https://pejiralitoke.files.wordpress.com/2020/07/7417143942.pdfIn PDF document text
    • https://simupem.files.wordpress.com/2020/07/lokabibumonovigiwafa.pdfIn PDF document text
    • https://zunizavuj.files.wordpress.com/2020/06/jupukopidaginimiriwuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.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_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 5208 bytes
SHA-256: 931c0d62b1c553bf5e58f38b5d4cb9dc8ddfc49e1c239bc19eb0f62b4f223bdc
font_01_sfnt_off00007ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF6 10664 bytes
SHA-256: d75a69c27f6a51804b5ee1f911897169b815b39f1b9ecac3a70527e5b192c22f