Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fd3eb2ea7c450c…

MALICIOUS

PDF

48.5 KB Created: 2020-10-26 00:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 17ae506e045b5a64774cc6ff6e4ea9e6 SHA-1: 9834b4de5566e3cf7ea3a2f7c2069660c17407c7 SHA-256: 74fd3eb2ea7c450c38b09d4b27956cc421fd255dbff27a0ac1d9453feabba42d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=cv+biodata+format+pdf+download In PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/3408294.pdfIn PDF document text
    • https://gexumuvebevo.weebly.com/uploads/1/3/4/3/134312536/e8219c8.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/letekigu.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/peguvadapi.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/dba18260af.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/8947703.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/xoxufozapogaw-vimefilixuvemiv-ludolodire.pdfIn PDF document text
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/turutexumotu.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/ginutu_roxetoju.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/ab327e714c.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/4303443.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/debubaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widuxade/sufapolumipafed.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/class_12_maths_syllabus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/59744925704.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/arteri_karotis.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/linaduponotopeximozepot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0650/3323/files/international_yoga_day_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4331/3604/files/30xa_carrier_chiller_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3081/3093/files/how_to_unprotect_a_word_document.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3500/2533/files/47836448976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/general_orders_3_civil_war.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/84882692208.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/37009297994.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/adobe_signature_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/dosolifudupami.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 5204 bytes
SHA-256: 4fe66d0c78b8abbe4f95f61e7b94c5b1be1fb784e1a4526940830046f2b2ff60
font_01_sfnt_off00007a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A09 5848 bytes
SHA-256: 7330ed6b3fd777a439f33c43b722b2a2ab409b6dc99a220f9072c65817cbe879
font_02_sfnt_off00008ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA9 11080 bytes
SHA-256: 4e214501050564d4e789846a8176c2d157e807e37531a973d03350ab45f74d55