Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f88063eb40c811c…

MALICIOUS

PDF

66.6 KB Created: 2020-08-28 14:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b11d4b9ec9401f436391b34b91de652 SHA-1: f60246ebab6b8be167fc2f5e7b36e09f6067e913 SHA-256: 1f88063eb40c811ccc00fd3920a8326c4c5c715717f70e30469e93d36a39ad5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL suggests an attempt to lure users to malicious sites for phishing or malware delivery.

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.me/pify?keyword=dudik+2013+tankcsapda In PDF document text
    • http://files.veenalothelaw.com/uploads/1/3/1/4/131453917/furalafokofevomape.pdfIn PDF document text
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdfIn PDF document text
    • http://files.stlawrencemereworth.org/uploads/1/3/1/8/131872079/fusobafibejig.pdfIn PDF document text
    • http://files.stoneofhopeyouth.org/uploads/1/3/0/7/130775195/0c229479.pdfIn PDF document text
    • http://files.puntacana-restaurant.com/uploads/1/3/1/4/131406535/befoxew.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/1/0430/0649/2823/files/mefudekonezaturanute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/rosix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/77654421744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/28275754169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/bijakanevisera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/42378076602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/73752872910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/60126800786.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_off0000bf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF35 5492 bytes
SHA-256: f058b34208225f187b55233665adb125c98f706cd204fe889f14b309e4dec9f7
font_01_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 14292 bytes
SHA-256: 2c68d9ae07a9068e915c0ec50ca32650c97f0acce1782e279692d57288ca9270

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