Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e62280d77f0578…

MALICIOUS

PDF

54.3 KB Created: 2020-08-23 01:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7caf78207fe0ddd1e4139dd0b6117c SHA-1: f77fb71aaca3335356041c6d4ad2332a5226a8c0 SHA-256: c5e62280d77f057819f7ac8568af582a8860368aad6f6c52e5e846a66f3e0057
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=codex+calixtinus+music+pdf'. The document body also contains this URL and numerous other PDF links, suggesting a link farm or phishing attempt. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=codex+calixtinus+music+pdf In PDF document text
    • http://kowal.wjeclatinresources.com/uploads/1/3/0/8/130813395/a1dc0594df991.pdfIn PDF document text
    • http://files.rfvgoalsuccess.com/uploads/1/3/0/8/130813095/6381773.pdfIn PDF document text
    • http://files.charlotteponyclub.com/uploads/1/3/1/0/131069897/paxumaputane_biwexukuduri_zukajapa_xoxuwekitev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/tokirolebitinivodumezew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/windows_10_enterprise_1803_iso_microsoft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0411/8428/files/latest_ankara_styles_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/lulobugosimefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1295/1961/files/margaret_runyan_castaneda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9100/2269/files/thesaurus_dictionary_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/320629168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/59120844384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/computer_graphics_tutorial_point_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/jujorogofiximemaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/gta_5_dns_codes_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/nixotigizam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/cake_shop_business_plan_sample.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a98.bin
90d670d7423b7f42be357337358d6c3c8ef6fc9963158cdca0e030fc3bc8d13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A98 5180 bytes
font_01_sfnt_off00009c27.bin
ac6da18dc0e75acd9e64c9409fb27096f1b8300489077f07e66d24e1d523236c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 9988 bytes
font_02_sfnt_off0000be44.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE44 4324 bytes

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