Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c037807957b5e4…

MALICIOUS

PDF

53.2 KB Created: 2020-08-06 21:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 561ffa228b3309ad6fd9c3d7d3f087db SHA-1: 6e945d1d2f0a5f6227bde9b19241dddbc090cc82 SHA-256: 08c037807957b5e4837a2d799ace9a977a3da69826573b81af96032da456d37d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a broad distribution effort. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=pancreas+anatomia+e+fisiologia+pdf
    • http://files.illanko.com/uploads/1/3/1/3/131378779/4870057.pdf
    • http://files.thegolfparadigm.com/uploads/1/3/2/6/132680974/8064855.pdf
    • http://tuxiwuka.classroomconfessions.net/uploads/1/3/1/3/131383791/5481727.pdf
    • http://mugitemem.saukprairiehistory.org/uploads/1/3/1/4/131408100/zagiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/orange_marmalade_manga.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/thesaurus_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34996744553.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/download_photoshop_cs5_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0439/0472/9243/files/91043588293.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/557821424.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/ardex_na.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/padiwiriwokurifusuvob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/domegakeripadeninem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/wagavinumusesud.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_off00008310.bin
8efecaf512e70de70e21d1d2ec119080cf64f4d8e3ba06e8c1252fa106fb2891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8310 5264 bytes
font_01_sfnt_off000094cf.bin
fc6658cedba1f4259207da975b206314c9f3174e1bc669c074533e805683c9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CF 10736 bytes
font_02_sfnt_off0000b94f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 4324 bytes

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