Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db3172e6f93d29a…

MALICIOUS

PDF

48.3 KB Created: 2020-10-16 01:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d252ecb6f0f435a365c15da54487700e SHA-1: 5cbc4eb15dacbbacd763c97aebdcc8c6c1f39d04 SHA-256: 4db3172e6f93d29abd06fadb287fedbbdc9d22fca0a5ef1bfeefec1fe3f425a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a malicious redirector, indicating an attempt to drive traffic to potentially harmful sites. The primary malicious URL identified is https://ttraff.club/pify?keyword=gre+probability+questions+pdf, which is flagged as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a deceptive lure.

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 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.
  • 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=gre+probability+questions+pdf In PDF document text
    • https://site-1041865.mozfiles.com/files/1041865/12359562513.pdfIn PDF document text
    • https://site-1042768.mozfiles.com/files/1042768/lejidepizef.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/xaxenoxejibazalaxiwe.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/wovuw.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://site-1038897.mozfiles.com/files/1038897/22711920987.pdfIn PDF document text
    • https://site-1042918.mozfiles.com/files/1042918/fufetaparijoja.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/43541747027.pdfIn PDF document text
    • https://site-1043395.mozfiles.com/files/1043395/buvolilisebux.pdfIn PDF document text
    • https://site-1048485.mozfiles.com/files/1048485/vozumusonapux.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8600574.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/wigugodituse.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/mijanepenomiketuros.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/5068852.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/wepezuwodu-fivusosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0489/3016/0824/files/android_alarmmanager_broadcastreceiver_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2806/8005/files/mr_carlsons_lab_signal_tracer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2956/4062/files/biogeochemistry_an_analysis_of_global_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8493/7900/files/rivermaps_san_juan_river_3rd_edition_guide_book.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_off00007bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD3 5436 bytes
SHA-256: 03040089c41e409fbff8a00a196b5ab85fe6506c4580e669989b8cb99d59fd82
font_01_sfnt_off00008e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 10952 bytes
SHA-256: bc557a8f56857d3c7dac5cb22edc025f2bb02c27d13206571c58a7c89cea7132

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