Malicious PDF — malware analysis report

Static analysis result for SHA-256 013a1f52191f60d0…

MALICIOUS

PDF

34.0 KB Created: 2020-08-03 14:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d367447a58ee241d37d0daa058bb336 SHA-1: 08f35c50c376a3185b7b32ae5028eb24e062ceda SHA-256: 013a1f52191f60d0d8bc6b932b92e89c84f6e738c8da3850c36119fd5abcbec7
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'avery template 5260 pdf' and URLs that are likely part of a campaign to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=avery+template+5260+pdf
    • http://files.ultimatesourceoflove.com/uploads/1/3/1/4/131453498/6490f44.pdf
    • http://files.stephanienogueras.com/uploads/1/3/1/4/131409909/5467653.pdf
    • http://files.destinyinthedetails.com/uploads/1/3/1/4/131437886/52ed19c5e738f.pdf
    • http://files.cliveyou.com/uploads/1/3/1/8/131856331/tegutolej.pdf
    • http://files.warkprimaryschool.co.uk/uploads/1/3/1/4/131454620/dusereluf-kegeja-vomedisewedenuv-bapexaximo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/64770464916.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/redajivogujez.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2504/files/77365957627.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/rogeferugud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/nata_aptitude_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/bellerophon_and_pegasus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/16074545646.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/91016380364.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/introduction_to_geographic_information_systems_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/17401271976.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/femaferimezarezisazol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/37404243082.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/fokimagewupale.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/64831146719.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/88534984065.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_off000047a5.bin
ba9bb0f8c8c77071d9b1e0f3b7d440e9af3af293320260f2d8abff16f4c8940a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A5 5712 bytes
font_01_sfnt_off00005b15.bin
b8acaa288dc67efbd8c118a31ff43725de07b5add1d8701c95d0546862ea0537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 9388 bytes

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