Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d1e9f8da17d76e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-19 06:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa0629fee89b795da894fe8ec14b04a SHA-1: b0563d492656d63e1119d5cd24ba55923d727b21 SHA-256: 64d1e9f8da17d76e3e32c728b9e1bc37d4f79debabff29f8291540218986aa94
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Epipen jr weight guidelines' and a URL that appears to be part of a link farm designed to distribute malicious PDFs. 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.cc/pify?keyword=epipen+jr+weight+guidelines
    • http://files.mje2weave.com/uploads/1/3/1/4/131453054/regazegisep.pdf
    • http://wekaligux.theceoexperts.com/uploads/1/3/2/6/132681081/soboketale_lovebera_jodomaduzuwuguw.pdf
    • http://files.renatasantorelliweb.com/uploads/1/3/2/6/132696012/9024954.pdf
    • http://www.pbs.gov.au/medicine/item/8698T
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/67347943775.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/abc_chart_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/18148288688.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/alan_jackson_albums.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/rise_to_ruins_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/attack_on_titan_theme_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/mewuwabezejizoteg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/ford_explorer_sport_trac_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/96492822162.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/descent_into_avernus_tg.pdf
    • https://cdn.shopify.com/s/files/1/0440/2633/1286/files/mysql_drop_column.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_off00006d05.bin
224f0c0e7fc187215166be044a6d19c26331340576818caf20d11b632a56af3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 5136 bytes
font_01_sfnt_off00007e8f.bin
3ee9dec409d59d4368e55d875c0f23fbc45ff177f0cecf70189f1bf8a85f66fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 10340 bytes