Malicious PDF — malware analysis report

Static analysis result for SHA-256 81df283d8f68c174…

MALICIOUS

PDF

44.6 KB Created: 2020-10-06 19:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b928c5cc5e8ed2a800a5254b417373e9 SHA-1: a84aa4ff79dc8a84bd263337b854fcb34a0628eb SHA-256: 81df283d8f68c1749c06083d6979cabbcd53738ed1988ad63024162ac09e1225
132 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The document body, though heavily obfuscated, also contains URLs that are part of a link farm hosted on disposable domains. This suggests the primary goal is to redirect the user to malicious sites, likely for phishing or malware distribution.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/pify?keyword=persona+3+fes+the+answer+review In PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/nitawijibelovopu.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/batujabisobemunik.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/zosuwat.pdfIn PDF document text
    • https://site-1039837.mozfiles.com/files/1039837/matekulananorudoxag.pdfIn PDF document text
    • https://site-1040670.mozfiles.com/files/1040670/kilanebufipijuterodoreg.pdfIn PDF document text
    • http://files.shirleyanneartstudio.com/uploads/1/3/0/8/130814923/5920007.pdfIn PDF document text
    • http://files.aprilscottphoto.com/uploads/1/3/2/3/132303019/zanadot-lipuduxobegud.pdfIn PDF document text
    • http://files.goldeneardigital.com/uploads/1/3/0/8/130874244/5806904.pdfIn PDF document text
    • https://site-1043117.mozfiles.com/files/1043117/27823425455.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/25241157519.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/nedojuveseferewi.pdfIn PDF document text
    • https://site-1039919.mozfiles.com/files/1039919/balepukolajojoxowoka.pdfIn PDF document text
    • https://site-1039675.mozfiles.com/files/1039675/fefuluremewovupefoz.pdfIn PDF document text
    • https://site-1038567.mozfiles.com/files/1038567/famexuti.pdfIn PDF document text
    • https://site-1039769.mozfiles.com/files/1039769/18871020364.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
    • 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_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 4928 bytes
SHA-256: ce84b0eb4971e1af08fa5716e3eb171366ea774ff67b92231bd456b23136db38
font_01_sfnt_off00007393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 10388 bytes
SHA-256: 2baae006f1319ba4fc5ffd1eb14f11dc0e65f175dd6cb636ea415c5f2f1d1960
font_02_sfnt_off00009726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9726 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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