Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5182ab92b245761…

MALICIOUS

PDF

47.4 KB Created: 2020-08-04 15:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd955845e5f573ff8dee7e1f46c252f5 SHA-1: 5faa90e88bf221d9d1e12878951beada122424a7 SHA-256: d5182ab92b24576183df165a0f53f45fdb54059d0c2e73952b118987677ebd88
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious link, https://ttraff.ru/pify?keyword=medical+instrumentation+application+and+design+john+g+webster+pdf, is identified as a known malicious redirector. This suggests the document's purpose is to lure users into clicking these links, which then redirect to potentially malicious websites or phishing pages. No scripts were extracted from this sample.

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.ru/pify?keyword=medical+instrumentation+application+and+design+john+g+webster+pdf
    • http://files.olgaklosowski.com/uploads/1/3/2/6/132680808/9312124.pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.pdf
    • http://files.banyinoodlestapas.com/uploads/1/3/1/6/131606666/debazezuragexima.pdf
    • http://files.pt-mum.com/uploads/1/3/1/8/131856987/dotetafif.pdf
    • http://files.beardensbackacre.com/uploads/1/3/0/9/130969728/5229850.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/35675098140.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/vekokolufesokezevajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/ridelatano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/perip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/dubarry_of_ireland.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/80469770294.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/28902447582.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/6262971407.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/coastal_engineering_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/foboxeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/96551889559.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/janexiditopovupafufodub.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_off00007887.bin
a0f434d373c85ea4944e4eb979944aa365ed10d2b3152cd80d16467fbcee74f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 5884 bytes
font_01_sfnt_off00008c7f.bin
448db97111f5c620428fa2e3e512e0bbcf76a18b62bd1fa2bfaa92ea1e7bc42a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 10348 bytes

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