Malicious PDF — malware analysis report

Static analysis result for SHA-256 000e805a7a56ea41…

MALICIOUS

PDF

50.2 KB Created: 2020-08-09 11:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 181c34df0f0e7b05b5ba87462e37e04b SHA-1: 836aab9c607e81197c0d8cd7118740417d62bdc1 SHA-256: 000e805a7a56ea416f88d7449df144ab2f8e26c39be4eccee4ae799561b541aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content through numerous external sites. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware delivery page.

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=dc+shunt+motor+applications+pdf
    • http://files.hasdssmrjones.com/uploads/1/3/1/8/131856039/96235d912e7.pdf
    • http://kexukur.equipasia.net/uploads/1/3/2/6/132681670/kojadigati_siveku_sizaba.pdf
    • http://files.premiermdstaff.com/uploads/1/3/1/6/131637919/5389761.pdf
    • http://files.entrustedwealth.com/uploads/1/3/0/8/130814205/difara.pdf
    • http://files.mypittsburgchamber.org/uploads/1/3/1/3/131379732/vipot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/bank_exam_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/the_brak_show_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/lebiratanoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/23295084325.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/espn_pga_scoreboard.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/wetupafadalinisuxinidor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/jepowofoverutumel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/bevanamatixat.pdf
    • https://cdn.shopify.com/s/files/1/0437/5334/1082/files/antologia_de_cuentos_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7678/files/semillas_amilaceas.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/tilufapuvinogevukoforur.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/bioethics_journal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/25713479556.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_off0000879b.bin
e3f4fd31f7229575a31b9f1264dc551b0a19b03a84098331c97d9e3a123ef3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 5396 bytes
font_01_sfnt_off000099cb.bin
0f7cc9418aa5b5cd1c6885461189aaa331f1a13da10826a66dfe2f7d7cb28857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CB 9848 bytes

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