Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b79cd1ce0c9cf2f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 21:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f45288e8eaf9bab815e8d03c489feb9 SHA-1: 092e748b3d2bd839d92cda1fffa4781eca4130d5 SHA-256: 2b79cd1ce0c9cf2fd9ec41db360347c27f9fd73024507ae23d58a55efbb53957
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is associated with a PayPal support scam. The document body, though heavily obfuscated, contains the same URL and references 'paypal support email pdf', reinforcing the phishing lure. The presence of numerous external PDF links suggests an attempt to create a link farm, potentially for SEO manipulation or to distribute further malicious content.

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=paypal+support+email+pdf In PDF document text
    • http://files.loveaffairwiththyself.com/uploads/1/3/2/7/132712234/xarizesus.pdfIn PDF document text
    • http://files.rhearuben.com/uploads/1/3/0/7/130775265/7fdac601d69.pdfIn PDF document text
    • http://files.thorinrealestategroup.com/uploads/1/3/1/6/131607029/xawigitodig_demisa.pdfIn PDF document text
    • http://files.thegoodlifeheatons.com/uploads/1/3/1/0/131070602/91c3ad5a2bc.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/1/0434/1065/3338/files/16793185514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/calidad_de_vida_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/analise_de_dados_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/allen_roth_ceiling_fan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/25295899497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/xixadagobafus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/nuwitod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/83429785435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/autodesk_sketchbook_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5555/7280/files/2nd_grade_reading_books_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/darirorebekemut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/pojofisajujabexiwajujawez.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_off000066b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 5288 bytes
SHA-256: 85e99b252fcbd36836fd09579b9a753d1fb8d76da0e90d3a63ddd0a525669e3f
font_01_sfnt_off000078a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 10320 bytes
SHA-256: 977538d02dc3d55c9d7d441ad8ac4071af6da131d6faf3ce744dc652d80b1ed9

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