Malicious PDF — malware analysis report

Static analysis result for SHA-256 f106fc3505240ebe…

MALICIOUS

PDF

65.7 KB Created: 2020-08-14 17:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eff804d37f13615c0db26ebdb87afba8 SHA-1: befea3c51cd8f602d0b5cd4768ed25fb0f3e044b SHA-256: f106fc3505240ebe9cb16f278bfc1a371c4aa7b2db46f09184815977ba48fd9a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=website+privacy+policy+template+australia+free'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

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=website+privacy+policy+template+australia+free
    • http://files.goodbless.us/uploads/1/3/0/9/130969424/xopixedawareda-wowukutozi-fevasutu-sekaligupoxijek.pdf
    • http://files.harrisontheatre.com/uploads/1/3/0/7/130776276/5018efd9.pdf
    • http://files.speedypawsagility.com/uploads/1/3/1/6/131606631/zuzelakenaked.pdf
    • http://melojesep.mooserange.com/uploads/1/3/0/7/130738950/luwaleg.pdf
    • http://files.touchofhaven.ca/uploads/1/3/1/3/131381722/romisejunuva.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/fake_pay_stub_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/76542072155.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/bewavudupajuruf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/winafoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/zuzasarevojekaruxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/black_and_decker_20v_weed_eater.pdf
    • https://cdn.shopify.com/s/files/1/0430/4673/1930/files/77925241917.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/bible_quiz_questions_and_answers_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/how_to_make_veinminer_work_on_everything.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_off0000c295.bin
e8f3459d8beb9ce541ea8ad366b803cf0bf73e52fd9366be54517935588ffe55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC295 5476 bytes
font_01_sfnt_off0000d52f.bin
865010bfb986342111159d3c175ce18fa04b6264d5eb38ca8d5073671181bd50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 10632 bytes

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