Malicious PDF — malware analysis report

Static analysis result for SHA-256 053cdf65857cb13e…

MALICIOUS

PDF

61.4 KB Created: 2020-08-09 20:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8a5f04d02765c2d1f3a605b0588dd8 SHA-1: b769446b6526ffd71fd6e72d838fc02e74b58c91 SHA-256: 053cdf65857cb13ed42dea95ee79a6f10b9bd5d8aec80a7dc343afe41b8993ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to distribute payloads.

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=adverbs+of+degree+pdf
    • http://files.difortea.com/uploads/1/3/1/6/131636954/93a24cb39b095.pdf
    • http://mekuvu.primepropertyfinder.com/uploads/1/3/0/8/130873995/d5cfc.pdf
    • http://lupokum.animalprotectors.net/uploads/1/3/2/6/132682883/b3ea7.pdf
    • http://xosobawo.ahsgirlslacrosse.com/uploads/1/3/1/4/131438216/203c5c2484b151.pdf
    • http://files.thenarwhalandthemanatee.com/uploads/1/3/1/6/131636980/9ad10c5b51d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/54657837007.pdf
    • https://cdn.shopify.com/s/files/1/0448/1371/3570/files/l_alchimiste_livre.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/corporation_bank_mudra_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7956/4448/files/26626594406.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/lirafaxezasubiwozedika.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/kotowula.pdf
    • https://cdn.shopify.com/s/files/1/0445/8368/2212/files/edexcel_a_level_economics_revision_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/19695073684.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/action_words_worksheet_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/pugivibukuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/18649154183.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_off0000a961.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA961 2828 bytes
font_01_sfnt_off0000b35b.bin
3a3b23f8e10dba714afb86941a0bd9010f697a4e50bb6604484bfdfbed028b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB35B 5156 bytes
font_02_sfnt_off0000c500.bin
99ae56061d68e0360336584430c6a35ca434d589e2a3cabd1a90a556e3862fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 10172 bytes

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