Malicious PDF — malware analysis report

Static analysis result for SHA-256 958fe77d3cbb6fa8…

MALICIOUS

PDF

45.6 KB Created: 2020-08-28 00:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 973462623804bce56db6fad080b7acce SHA-1: d91987d5118717646a6c068d492da06c624d99fd SHA-256: 958fe77d3cbb6fa8be5a8efde80ad066c90c2e694a22c20d22461b8bb02acf74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.club/pify?keyword=que+perfume+usaba+valentin+elizalde, which is flagged as a known malicious redirector. The document body, though partially garbled, contains the same question as the URL, suggesting a lure to generate traffic to malicious sites.

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=que+perfume+usaba+valentin+elizalde In PDF document text
    • http://files.mykmad.com/uploads/1/3/0/7/130775561/1ddc528ed8b.pdfIn PDF document text
    • http://files.pageantsbymindy.com/uploads/1/3/2/7/132740193/nofutegi.pdfIn PDF document text
    • http://files.secondfamilyenglish.com/uploads/1/3/1/4/131438228/kejoxekenarub.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/1/0428/1604/5222/files/donuguruganikuwarokala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/mozijivejosirena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/94288730659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/jisatamatunizedopuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/giwebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/momivofajekudinevufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/consumer_reports_chamber_vacuum_sealer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/vonibizivafewaguxasasozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/oxford_discover_4_workbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/59886332962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/6012371751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3170/5238/files/manual_propietario_chevrolet_aveo_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/vuxinikufekamopukojilo.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_off000065ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5268 bytes
SHA-256: 2924cc96d52c6f02a6bcf8368265bbb3af402dc2ab79becd4df1b1d2d7e35546
font_01_sfnt_off00007782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 10972 bytes
SHA-256: aeb101fbac9be0588b595bad783665682284994b84eaea2936d3a7d5de662dd7
font_02_sfnt_off00009b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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