Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e34ef4270ab521…

MALICIOUS

PDF

42.7 KB Created: 2020-08-04 15:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0c961b1539cabf4bb1579741b8070a SHA-1: 409cf42fe9b7801bffc6e506570a7c32853df13b SHA-256: 06e34ef4270ab521f1ab5b3035e637d1eeaf1bd84e3a8b7542c100ddd24dbc2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are part of a link farm designed to redirect users to external content. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a malicious intent to drive traffic to harmful sites. The ML classifier also strongly indicated maliciousness.

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=op+amp+circuit+examples+pdf
    • http://files.alphatrucksolutions.com/uploads/1/3/0/7/130775387/beae45597bf6.pdf
    • http://files.liveinpeaceministries.org/uploads/1/3/0/8/130814078/gulebibonanowa_guwurupi_fotewasajako.pdf
    • http://files.hwah.ca/uploads/1/3/2/6/132681482/6419870.pdf
    • http://files.chestnuthillonline.org/uploads/1/3/1/8/131872079/vabiv-zetite-selamexemalo.pdf
    • http://files.blbrunnemer.com/uploads/1/3/1/4/131408024/sosexuvirewizil-daxije-petudobibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/zepiwupokejisovatiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/64533511303.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/zugofetaranimowakef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/job_application_form_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/papenima.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9697/files/tonojurazoxawefipozuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/suwidoxizitexiwiketitud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2354/0124/files/35113166096.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/58332106019.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6332/files/lemewonubibinizoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/4427263644.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/sirasavumunixusunolar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006882.bin
74e3b34b179dfa8eabc42bef5ac245133061742177ad23178db9769615713562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5396 bytes
font_01_sfnt_off00007ac5.bin
9f4762a31b6ed0961f48ba02b8394f24510ae144a92a0c03d1d9aff0c15cd22f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10276 bytes

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