Malicious PDF — malware analysis report

Static analysis result for SHA-256 01850af6e8f36e08…

MALICIOUS

PDF

49.6 KB Created: 2020-08-13 23:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2617f9ee5134d77f38a50ac14279655 SHA-1: 03bb33534a47016c51099a44195272b90f461038 SHA-256: 01850af6e8f36e088620ed516ced5b6f5cedbbfe6f9e2b8057b5c683c4af715a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF contains a malicious redirector link disguised as 'dog food feeding guidelines'. The document body and embedded link structure indicate a link farm designed to funnel users to potentially malicious infrastructure. The primary malicious IOC is the 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/pify?keyword=autarky+dog+food+feeding+guidelines
    • http://files.brookebauerboutique.com/uploads/1/3/0/7/130775633/c6b70877c2d44.pdf
    • http://files.hanleyvoices.org/uploads/1/3/1/6/131636988/cf49b860.pdf
    • http://files.cantonfitnesscenter.com/uploads/1/3/1/6/131606923/nokano.pdf
    • http://fujetit.farmtoartfun.com/uploads/1/3/1/4/131437736/5377827.pdf
    • http://files.customdecorativemetalwork.com/uploads/1/3/0/9/130969580/fibavorowaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/28667109676.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/ca_cpt_accounting_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/earth_porn_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/nebomopanubewuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/zalejav.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/arapa_kelimeler_yazllar_ve_trke_anlamlar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/sogenilusajupijasorezajek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/epf_withdrawal_form_19_10c_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/limugalorelejikibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/jadinesej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/76722670391.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_off000075d1.bin
85a660885c7cd9952e9c9ecae1b1fe85fad6fa3448afe1f21ac697481af13f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 5112 bytes
font_01_sfnt_off00008758.bin
a0bdd5f4ff438db75eb555d36cded4ca553b3e5bd92b9737750413b6cb16fb2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8758 10672 bytes
font_02_sfnt_off0000aaa8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA8 4324 bytes

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