Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b5d4f323c3788b…

MALICIOUS

PDF

50.2 KB Created: 2020-08-10 05:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7b88270e6d20c9d4bec188e8aba80b SHA-1: b33058be240d67af5eed343a1cdef035f6c3ad0b SHA-256: 19b5d4f323c3788bf1147fc9499ffde2d3bed022c156703d093974ad28cc792d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure referencing 'The Economist' and a date, aiming to trick the user into clicking a link. This link, 'https://ttraff.cc/pify?keyword=the+economist+pdf+21+july+2020', is identified as a malicious redirector. The document's structure and content strongly suggest an advance-fee scam, where users are enticed with a prize or delivery and then required to pay fees. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=the+economist+pdf+21+july+2020
    • http://files.bucklesandbeads.com/uploads/1/3/1/1/131164202/478f1.pdf
    • http://files.karuklanguageresources.org/uploads/1/3/1/8/131856995/deninejo.pdf
    • http://files.guitarhympia.com/uploads/1/3/0/7/130739777/bipazovulabebu-zesexonuxemav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/green_felt_freecell_solitaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/13115201073.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/surepuriwaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/64917147635.pdf
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/aviones_para_colorear_e_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/7486999333.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/pizuwofukutisuxegosin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dimisinosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0437/7516/4574/files/16515981236.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/active_bandpass_filter_design.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/anthony_giddens_sociologija.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/64235443312.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_off00007802.bin
ec886695d184ab92ff3921215e2b32557e722d188105f5c0c1a544024b0cdbd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 5424 bytes
font_01_sfnt_off00008a64.bin
d548105606928ed65796df8251b48613662f2d355e93367895ae6faeee345041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A64 10268 bytes
font_02_sfnt_off0000ad75.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD75 4324 bytes

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