Malicious PDF — malware analysis report

Static analysis result for SHA-256 1078cd8dc3b9ad5e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-13 22:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 691ffe450a91742c55bfacda4d3fe562 SHA-1: 032cc35a5a5942572bbe2edbe1c7091ad7c2afdb SHA-256: 1078cd8dc3b9ad5e74f75c1c630feac13dc7c3ee98e0ce9daaca2774c261ad61
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, suggesting an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or SEO poisoning 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.ru/pify?keyword=acer+e15+bios
    • http://files.quadcitypoker.com/uploads/1/3/0/9/130969052/lumasoxurebem-kowekanewukejo-banapewizujiki.pdf
    • http://files.fourlittlecarpenters.com/uploads/1/3/0/7/130776644/lanimuxefizepul.pdf
    • http://files.zip-dang.com/uploads/1/3/1/3/131383664/gadizubobowow_kufusu.pdf
    • http://files.bravohobby.com/uploads/1/3/2/7/132712147/belijesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/23384585960.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/10434492554.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nedasuzomezurilinipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/gufikigem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/24100903785.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/pdf_architect_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/w3schools_html_tags_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/polar_coordinates_to_rectangular_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/donapolovopadamifa.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/internet_addiction_definition.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_off00006784.bin
e0bc198c8d17f3bcfb4b459a0f4d53911717c088265c7268987cef24fdec2543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6784 4856 bytes
font_01_sfnt_off00007821.bin
75b8e405568183cc379919d7d797b35a2cb5775eddd568c014a3e653404b0c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7821 10184 bytes

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