Malicious PDF — malware analysis report

Static analysis result for SHA-256 6074699e78315d57…

MALICIOUS

PDF

51.7 KB Created: 2020-08-21 13:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7d9bbc085e9a25d6d3689f831781fb SHA-1: 76d29f4aa0840373b0d3e1d4c68e12310e127c62 SHA-256: 6074699e78315d57109910c88646c24ca057a29e040b8415612f6b16171a276b
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, https://ttraff.ru/pify?keyword=learn+english+sentences+used+daily+life+pdf, is identified as a malicious redirector. The document's structure and the presence of the malicious redirector suggest an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=learn+english+sentences+used+daily+life+pdf
    • http://files.adoreweddingdesign.com/uploads/1/3/0/7/130776205/c465823d8.pdf
    • http://files.jasondry.com/uploads/1/3/0/7/130739826/ruvexafun_bivok_sasojutexemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/84364231251.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/pcg_almanac_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/kobuluj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/24884187843.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/21418381634.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/65915993222.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/10195411080.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1544/files/659060218.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/download_software_reader_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/uk_nice_guidelines_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/reproduccion_animal_libros.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665c.bin
a873deb8bf9471fc4a43b80b0b7dbc72281a6d9158b0e8d779f3ed39d0364546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 5460 bytes
font_01_sfnt_off000078e8.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E8 3720 bytes
font_02_sfnt_off0000844c.bin
eeb2cd2efbf60cdc1a633a1a92070b98e2834e682aaff1b78331e5a14b6c32cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 14456 bytes
font_03_sfnt_off0000b18b.bin
416b805e44cf8b5a9669bca7c983fadd29caf1050d2324ad4376164280dffc99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB18B 3936 bytes

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