Malicious PDF — malware analysis report

Static analysis result for SHA-256 03485278892ced9f…

MALICIOUS

PDF

52.5 KB Created: 2020-07-29 00:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18413ce431184e693da429ad6f36f3c3 SHA-1: c07f289f01d17288f5f1bff28f1092f37dd550b7 SHA-256: 03485278892ced9f744a6e7af889e966e4252b715337b45ae094de10cbb665ca
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. These factors suggest the document's primary purpose is to redirect users to malicious sites or distribute further malware.

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.com/pify?keyword=dragoneer%2527+s+aria+guide
    • http://files.casieaceea.org/uploads/1/3/2/6/132695575/f92b7800957f88.pdf
    • http://files.piercingcrossfit.com/uploads/1/3/1/4/131454272/4279560.pdf
    • http://files.miamibeachslsc.com.au/uploads/1/3/0/7/130775647/mapoxojorezukovad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/58017697418.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/lebekitigakazenaxoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/pezawalegunejivelusagiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/61309654819.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/98267683929.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/kifozazibetokulaxubakeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/62986185987.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/tekadinofatemenudimelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/figakedopabuzit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/40229740177.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/53355289042.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_off00006efb.bin
c067e1a73b6fad314e465f86131c25202fcb30a0c09a0e5a4877c0202c22960f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 10956 bytes
font_01_sfnt_off000092c0.bin
e609a78919d1b10355536bf61c9f19dc600f2b429baa98a0a83d06ac8fdf7490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C0 4796 bytes
font_02_sfnt_off0000a314.bin
187a42aac79efafced7518f0a31bf6e89bf8abf7d98724a4d149ab0123679ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA314 9880 bytes

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