Malicious PDF — malware analysis report

Static analysis result for SHA-256 714f0166fef2a160…

MALICIOUS

PDF

37.7 KB Created: 2020-08-10 12:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b451d4018236da95777deb631b890c77 SHA-1: 8bcf72547153441f2e07a07add22dda3f5ba7d3f SHA-256: 714f0166fef2a1609ea83a8d792cb13b798968e5b3d86d7bb54d26f6e0c7702b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to loans and includes the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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=difference+between+secured+and+unsecured+loans+pdf
    • http://jasasozen.crustandmagic.com/uploads/1/3/1/6/131637881/vimuxopobuzit-nigasenavisur.pdf
    • http://files.drinkbeautynola.com/uploads/1/3/1/4/131408913/8812690.pdf
    • http://files.jeffmacauley.com/uploads/1/3/0/8/130815664/52031a6dd22efaa.pdf
    • http://wunafor.tierraburns.com/uploads/1/3/1/4/131437987/edf0f20ff240.pdf
    • http://files.shophandmadefarmstead.com/uploads/1/3/2/7/132741352/topamijajemug-furenonirex-tijupafamejege.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8317/7887/files/82209749040.pdf
    • https://cdn.shopify.com/s/files/1/0448/1551/5805/files/college_botany_practical_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/42080357890.pdf
    • https://cdn.shopify.com/s/files/1/0428/7994/2812/files/angina_estavel_instavel.pdf
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/amines_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/keto_diet_chart_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/first_year_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/digikitubonuvajuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/agonistas_alfa_2_adrenrgicos.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/nivawupewagofapatidipaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/wexelubakeviwixejub.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/bovatonagerediwagi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005768.bin
a86f2d07f2e7389063934322f990bd08020499c29271cda3329546f20d3c9f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5768 5380 bytes
font_01_sfnt_off000069d6.bin
4496f7fd61180f164140d02734b612dc925bf3a450971424bfc66a86183ff6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D6 9256 bytes

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