Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6d26a47662ba4e…

MALICIOUS

PDF

54.9 KB Created: 2020-08-20 09:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28011dd9e875db29f937fae296d49a55 SHA-1: bdaa4b2c14083578a2fc393af013678d0b12f9dd SHA-256: 1f6d26a47662ba4e9dfb2ec0c86103de6dfce4a3a17008b28a62bff5886bdb10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high number of embedded links, many of which lead to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains the redirector URL, suggesting a lure to external malicious content. The presence of multiple Shopify URLs, while some are benign, indicates a potential attempt to host malicious content or disguise the true nature of the campaign.

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=snake+plant+planting+information
    • http://files.emilycaffery.com/uploads/1/3/1/4/131437513/gutofapodofigonuta.pdf
    • http://tafiroze.katgaddis.com/uploads/1/3/0/8/130874601/ed4e03b5619a87.pdf
    • http://files.catchingnumbers.com/uploads/1/3/1/4/131438464/a765a.pdf
    • http://files.longhornsdivingcamp.com/uploads/1/3/1/4/131437276/momavowilubumil-vavasiputodon-foxukiru-bixebojozivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/our_latin_heritage_book_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/befusevatarunuvuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/kodojobono.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/gunukukokazorazaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/25983040691.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/business_studies_grade_12_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/93632526925.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/jizojegezibeki.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/althusser_ideology.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/jakejeloxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3538/5247/files/believe_polar_express_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/romanticism_and_nature.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_off00008bb4.bin
b702cdf9f84426b724fed0ed88149553357ab3486c7b44cd727a28ec99e36099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 5212 bytes
font_01_sfnt_off00009d60.bin
ab72e4c0160c69aa9d98d7008664aa2d0930c5456c958d07b93f497160cfbc8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D60 15996 bytes

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