Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e59f610f0872e59…

MALICIOUS

PDF

45.9 KB Created: 2020-08-25 09:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c21e09ca4b6b6326f67080d9844c91bf SHA-1: 9113d50ed724994861606f9585e2ae12174945fb SHA-256: 0e59f610f0872e5931c2fa43de2aaeb2a6181dd445a6bca7e147229cdc3d7ff0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to 'Umbrella Academy soundtrack' and embeds a large number of external links, many of which are hosted on unknown domains. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=umbrella+academy+soundtrack', is flagged as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicates maliciousness.

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=umbrella+academy+soundtrack
    • http://janirewo.slimshaynee-gaming.com/uploads/1/3/2/6/132683165/f8dda92.pdf
    • http://files.solit.studio/uploads/1/3/1/6/131606260/joruk_bodewukejaluwi_zapunufo.pdf
    • http://files.laminatedturningblanks.com/uploads/1/3/0/8/130813301/gadarejizubajam-wakevori-mesabebigemexoz.pdf
    • http://xadumat.johnkcoffey.com/uploads/1/3/2/7/132740435/zatozuxasekuno.pdf
    • http://bumibezo.nejcrwc.com/uploads/1/3/0/7/130739235/kamikifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/84366810963.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/dictionary_bengali_to_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/14780727840.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/cambridge_pet_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/applied_behavior_analysis_2nd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/article_a_an_the_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/blocklings-_mod-_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/darkening_of_tristram_2019_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/15171754921.pdf
    • https://cdn.shopify.com/s/files/1/0451/8913/6533/files/affixes_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/99690752883.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006805.bin
0502a77d78ddcac9298a03106dbf9b9c4e81c77ca61785afe5f2cc80b3aff2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 5216 bytes
font_01_sfnt_off000079a4.bin
f8debc6dd127173cc3e9972cfb37029f8b651b4407a536d39693e0c7df66a60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 10172 bytes
font_02_sfnt_off00009c60.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C60 4324 bytes

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