Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abcdcf3097b42c6…

MALICIOUS

PDF

37.1 KB Created: 2020-08-22 17:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d24ceaa7d043560b34c9a92187d9042f SHA-1: c9b2ecdd91986b50ed9937b2ade91626261133ec SHA-256: 5abcdcf3097b42c6d4e8a66dc987e9f7db4d6ebcfa8e554ac8aea41f956af218
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. Crucially, one of these links, 'https://ttraff.cc/pify?keyword=solving+rational+inequalities+with+answer', is identified as a known malicious redirector. This indicates the document's primary purpose is to direct users to malicious infrastructure.

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=solving+rational+inequalities+with+answer
    • http://files.tobyupci.com/uploads/1/3/2/6/132696018/100ff90e6acca6.pdf
    • http://files.mhaplanningforsuccess.com/uploads/1/3/1/3/131384424/9346303.pdf
    • http://files.kidsconnection-childcare.com/uploads/1/3/2/3/132302718/59f650.pdf
    • http://files.carolynmartinodesign.com/uploads/1/3/0/8/130814858/7dd71f42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/charpy_test_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/assured_tenancy_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/sokuxamitul.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/uc_browser_apk_mini.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/asiana_airlines_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/apologize_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/ponamipalupitumidolixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/bar_rust_235.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/ordo_hemiptera.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_off000055a0.bin
eb95e356853526d8461ad459841b182c260b945f4d7278a013572519fffe5308
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0 5328 bytes
font_01_sfnt_off000067c7.bin
a2b44b175abad0255079eb65919d55f559acd14fcbcdb43ea12b196ad4969375
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 9376 bytes