Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3ee600a9eb51e5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 01:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afa8358dbb610ccf6ffe5ba2c9439e3 SHA-1: da97c56cefd37b4347aec3f0861b73dd01caaeb3 SHA-256: 0c3ee600a9eb51e5521c3dc3a904c59ef7bb97ca764b26d6cb75594a7d703a0d
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The presence of a "download button" heuristic and the embedded URL suggest a phishing or redirection attempt to a malicious site, likely to deliver a secondary payload or phish for credentials.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=architects+company+profile+pdf
    • http://files.palmbeachpipes.com/uploads/1/3/1/3/131380213/duvifaponoxejozoxa.pdf
    • http://files.purpleinkpublishing.com/uploads/1/3/1/4/131437844/mikofoxaxomojope.pdf
    • http://files.carolinefconway.com/uploads/1/3/1/3/131398076/sadezufawotuwo_dowabasamow_kivanaj.pdf
    • http://bipux.fabiansmagic.com/uploads/1/3/1/4/131438477/fenikudeki.pdf
    • http://files.encourage-fmhs.info/uploads/1/3/2/3/132303353/kawivakizudure_gopux_gepin_xezunubisemonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/phonics_worksheets_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4882/files/button_mushroom_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridikesomuzumiburowafex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/enigma_otiliei.pdf
    • https://cdn.shopify.com/s/files/1/0431/2262/2621/files/best_way_to_annotate_on_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9050/1020/files/batuan_sedimen_karbonat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/bodataweju.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/vunowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/liwenel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2957/files/the_worlds_hardest_game_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/nick_offerman_american_ham.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/damusafapulebiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/34726726860.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5979/files/79207949804.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_off00006573.bin
27d7a0a3e877d05e18497ec0b658811654b72b5fe034542c21d9b3e0dad8ddff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 5484 bytes
font_01_sfnt_off000077f9.bin
ea56a82818511befda188bf21a20afaef72a5456058cf1ccd3f1f3fec7af4047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 9896 bytes

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