Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e59a584f53048fe…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 18:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbbead089b106ac41dc86aa7ac42b921 SHA-1: b32000de79056064a6eb2aaefbdd9baa364926bc SHA-256: 7e59a584f53048feb34c02772730cc8cd105a62b42613fafdebb4c6d66f50d9b
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm designed to host SEO-optimized PDFs. One prominent link redirects through 'ttraff.ru', known malicious redirector infrastructure, to a page offering an ebook. This suggests a phishing or scam attempt leveraging SEO techniques to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=ebook+calistenia+pdf+gratis In PDF document text
    • http://silewulen.hilcoeyeglassrepair.com/uploads/1/3/2/7/132740720/dbc0707b703.pdfIn PDF document text
    • http://files.teachsciencealabama.com/uploads/1/3/1/6/131636678/tazebig_valaner.pdfIn PDF document text
    • http://files.gusconstantine.com/uploads/1/3/0/8/130814058/rexada.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/1/0428/4825/6156/files/9175911921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/71268835882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/pibaxalawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/47630762676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/bsc_zoology_notes_second_year.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/bible_character_study_outline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/899445976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/96437143101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/niwovepef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/african_union_anthem_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/24324073496.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_off00005a96.bin
4f993801e1e949abf57ddafd63d5d0a71c9b9225500cd52719b81fe0c7f10fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5484 bytes
font_01_sfnt_off00006d3f.bin
28becba2dbd3bb0c36b1b1285dacd1979992899b713df9466a8d963357f5524f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3F 10364 bytes

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