Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03e01dfaddab6c2…

MALICIOUS

PDF

51.3 KB Created: 2020-11-02 19:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 32ec80a47fb7abdea494a6b94749062b SHA-1: 24b43f1434a4b25b3b0f926b3c9535caa9de12ba SHA-256: d03e01dfaddab6c24ba5ccfe96475b66c0ed9088228712479038b6fc4af8f85c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ggtraff.ru/aws?keyword=the+heroin+diaries+pdf+free+download In PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/4bd5d9910.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/af3ccf14366e00.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/6437483.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/botesopawozobagit.pdfIn PDF document text
    • https://jaregufadux.weebly.com/uploads/1/3/4/0/134016720/cb932.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/988ea280b27d.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/1/0502/4628/7513/files/luvafetomasaronesirivama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5089/9873/files/wudisetizikugabarel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56d3bdd-f9c9-4790-89d0-7759cb05cb97/1562369356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad54088-c7f7-4c4a-aacc-50a9ee6724fc/taxenilarawavaniludeb.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/1938685837.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/xowegejibalunove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9980/7651/files/smoked_salmon_nutrition_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4335/5293/files/werujidolemaniwefedib.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000093b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x93B9 24916 bytes
SHA-256: 77a7ac1b6fa74135cfa60ac7808db67667adf543237a4b6f115955089c360d37
font_00_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 5168 bytes
SHA-256: 2b5c2a62ab140673fb70b16c4c807beaac401f4767441315f98ec0dd838d58d1
font_01_sfnt_off00006fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEA 10676 bytes
SHA-256: a852f655815898ed2badc4288b6a02c6ff3194d18585da4246f9d1cdb3bf67d1

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