Malicious PDF — malware analysis report

Static analysis result for SHA-256 0144382fbe70dd7d…

MALICIOUS

PDF

46.7 KB Created: 2020-08-08 11:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daf28d8ed983ee7b81e857060cb5a53e SHA-1: a070ca385c222226650c50fb79579a3e6fd298da SHA-256: 0144382fbe70dd7d30929186f57f10a7320b7b8c2f106693d4a97524137e7206
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. This redirector likely leads to a phishing page or a malware download. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to compromise users.

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=ghersi+cemento+armato+pdf+download
    • http://files.baskog.com/uploads/1/3/0/8/130874457/20d2f285a5b.pdf
    • http://dafedol.royalehairstudio.com/uploads/1/3/1/8/131856917/dixopomox.pdf
    • http://files.stephaniemiracledances.com/uploads/1/3/2/6/132681757/99b179188f7168.pdf
    • http://files.alare.net/uploads/1/3/1/8/131871740/fumopeduxoduxanikav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4493/7623/files/que_es_auriculoterapia.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/gilidakoxotusugupob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6938/files/97114592544.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/xubumora.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/13654545234.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/acls_card.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/wakujubiveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/paruwedemaxaxot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/39897517089.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/52566958319.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_off00006882.bin
ccc4547a98dd9f070d46abad8478a214585278f9665abdc5d4e757ac199b1911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5304 bytes
font_01_sfnt_off00007a77.bin
c67c4ccf9ce4c636991a35a749316b19334987f3d2b024fb20530e54a911b731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A77 11404 bytes
font_02_sfnt_off00009e2c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2C 4324 bytes

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