Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9047c0737d8c6eb…

MALICIOUS

PDF

46.8 KB Created: 2020-08-18 15:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a860b0f5fa684a33d43e60f5794e10ce SHA-1: 39ab6fd75752911489c46d7baca598493a6b5cb5 SHA-256: b9047c0737d8c6eb44ca85a5851a9fc9b58bd12a7b1e7abfca5e559f02867154
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body contains garbled text but also includes the URL 'https://ttraff.com/pify?keyword=huvec+tube+formation+assay', which is likely the primary malicious destination. The presence of numerous Shopify links suggests an attempt to blend malicious links with seemingly benign content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=huvec+tube+formation+assay
    • http://ruseta.allenbuildinstruments.com/uploads/1/3/1/4/131452890/6717883.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/beck_hopelessness_scale_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/bomuvanazas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/xemon.pdf
    • https://cdn.shopify.com/s/files/1/0436/7797/4678/files/kurutetamufup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/am7_g_guitar_chord.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/systems_of_linear_inequalities_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0935/7477/files/dawidazisatufediwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/kuwejuzixozisivelegito.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/cardiopatia_hipertensiva_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/pasar_de_a_word_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/78850466451.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/lumebogamaxibomaselobe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/64310952528.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/chirality_of_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/288068221.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dfd.bin
49499b0a64b534b4f6a90cf7479607e60f8d1c544543cfdd4a55e85be8d75c17
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFD 5256 bytes
font_01_sfnt_off00007fc9.bin
8832d82628d7d6fbc5e26d22cfd269a40a43dd6648940d69ca15d75e8a275dac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 15292 bytes