Malicious PDF — malware analysis report

Static analysis result for SHA-256 010c446539d65a1c…

MALICIOUS

PDF

46.5 KB Created: 2020-08-30 04:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d60f7e070f48bf117f8a89c45b2f1d20 SHA-1: 35020a63333fba8b52dd4686451f47f14bf756e1 SHA-256: 010c446539d65a1ca09a22fd5edba998101312ff3f79112969146ab2f4217aa5
154 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded URLs, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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/wix?keyword=luces+navide%25C3%25B1as+de+generando+tx+High
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_aff3818902e54d208e826a8eac1c6363.pdf
    • https://static.usrfiles.com/ugd/0049ca_592cd78199c64753b1886f18486b7947.pdf
    • https://static.usrfiles.com/ugd/b8c837_6488a0cfe728435b831603c2fb947484.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/48d9a1_8662a850903447abb4544164ec027089.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/panchatantra_kannada_new_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9100/files/graphite_material_properties.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/vuvorupoduda.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/85177759415.pdf
    • https://cdn.shopify.com/s/files/1/0449/4727/5931/files/liniroguxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/domipojixijozegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7223/files/79182078013.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/rexuxitavivawopim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/24374925844.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/51404602091.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/21226989453.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/peviweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/alchemy_books.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_off0000660d.bin
8cae964506a2b985f3557329fec0c8264dd2f282be45049e8304d48614f517f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 5388 bytes
font_01_sfnt_off00007811.bin
b0e68840c4859ce61b7e0b5e7cf3cebfe753e4c3447ca7477799f81a7d492616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 11236 bytes
font_02_sfnt_off00009c7b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7B 4324 bytes

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