Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c2f1e33c2daf11…

MALICIOUS

PDF

45.0 KB Created: 2020-08-24 13:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffde57ab0d4212594183dfd5366c9cb0 SHA-1: a4fd192fb60d38a6c5c51eaba369867b9f46f076 SHA-256: 09c2f1e33c2daf118d50a93298c0493d266fb76b22de0b275c55e8516b7c7db7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free educational games' and the malicious URL, suggesting a lure to malicious content. The presence of a large number of external PDF links further indicates a link farm or redirection scheme.

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=free+educational+games+for+adults
    • http://files.russellblackford.com/uploads/1/3/0/9/130969433/vakekej.pdf
    • http://sezuwedo.staciezens.org/uploads/1/3/2/6/132682989/gilamelomawutax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/radadaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/62692846901.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/50541518925.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/kogifivewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/bridge_over_troubled_water_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/bottling_up_emotions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/fuwodutavalagazisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7616/4515/files/autocad_2014_lt_64_bit_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/lovogomedanaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/gaguxusemumi.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_off0000722f.bin
2133a7ec80647fd327682787f82884ec9fba37a84aa87d1005504f92b9618f52
pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 5296 bytes
font_01_sfnt_off00008412.bin
61cc5efea0dfb46c27ddde205f82586b49777427953d84593f94bb2ab8fc232c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8412 10352 bytes