Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e94af6b34de8fcc…

MALICIOUS

PDF

46.5 KB Created: 2020-08-24 02:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f97207e1e423bb4c617ff89a350dfdf3 SHA-1: 08395faf3b44c60a8e07ddae45472de2cae02d8b SHA-256: 0e94af6b34de8fccc0176bd832e9c5a94a79d17e9f0019b60f0186e61840d8e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also features a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier 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=antioxidantes+y+cancer+pdf
    • http://files.solutions2050.com/uploads/1/3/2/7/132740620/acd8710342bcf6.pdf
    • http://files.discreetlyarmed.com/uploads/1/3/2/7/132710782/af31c.pdf
    • http://nukiwo.arcarbroath.co.uk/uploads/1/3/0/7/130776445/riremazobiv_dilupujeninujes_marogakojutasok_kafanevokaxeros.pdf
    • http://ridisez.eralnetworks.com/uploads/1/3/0/8/130874493/9493994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/5109/3914/files/chandrayaan_2_details_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/93350904883.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5942/files/kerry_group_plc_annual_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/57013358327.pdf
    • https://cdn.shopify.com/s/files/1/0464/9805/4312/files/12106368818.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/ignou_mps_solved_assignment_2020_19_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/migoluwufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/diwegirexajoxukurewu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/45914916907.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/rasedezuwikamuwirib.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/dewixegisixa.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_off000078e9.bin
2304b49e0e0b57d6e890d032608087d4889f74ae89dffac2e1b83aa1c661882b
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 5276 bytes
font_01_sfnt_off00008af3.bin
fe764a56d7cdd360b3a63e8f915ef91de7a1b850cff2fdd6cd328e263bfac174
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF3 10144 bytes