Malicious PDF — malware analysis report

Static analysis result for SHA-256 6948e3e267ce0cae…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 03:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f2be7a9109eaef6cdbe4d0bc5850f3 SHA-1: 2c48144662ef171e83da7776d098543f506b48fc SHA-256: 6948e3e267ce0caeda1c5877de618c1d61fc86df1c259427ba5103aa11ba472e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at https://ttraff.com/pify. The document body, though heavily obfuscated, contains text related to calendar templates, likely a lure to encourage clicks on the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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.com/pify?keyword=november+december+calendar+template+2019 In PDF document text
    • http://files.tanurhideboerne.com/uploads/1/3/0/7/130740563/kewujur_fevumo_dawixuxomipa_sitidewe.pdfIn PDF document text
    • http://nujuxofa.dhmtoday.com/uploads/1/3/1/4/131453197/525884.pdfIn PDF document text
    • http://lovusi.realnancykrulik.com/uploads/1/3/1/1/131163635/7132011.pdfIn PDF document text
    • http://files.omgirl2013.net/uploads/1/3/1/3/131384575/6513095.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
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/72620686488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/30162681636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0571/7141/files/you_raise_me_up_piano_sheet_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8635/5357/files/brindisi_report_ghepardo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/sisabejivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/11682903762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/70768638261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/gutavidigilemababajifuzat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/lipumujo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eb4.bin
e8cb49ae4fc518d6287238726f54817355498834ba8cd7c60f9fce83a4ab722e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 5432 bytes
font_01_sfnt_off00008113.bin
ddf29553172dec158764952ad0298e673efa241186ef63e11f796e03b20b3732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8113 10328 bytes
font_02_sfnt_off0000a465.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA465 4324 bytes

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