Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ebd3e4f64ae0c3…

MALICIOUS

PDF

54.8 KB Created: 2020-08-26 17:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6523ea2d706a454350ee13a30bfa1ce SHA-1: 7e290e7d83179bf0ee83e81c13abc0aabb7e09d0 SHA-256: e1ebd3e4f64ae0c3334f404cf6827ce12aa693277443f933a60519f014548997
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to Excel and a URL that appears to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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.me/pify?keyword=excel+bedingte+formatierung+wenn+zelle+link+enth%25C3%25A4lt
    • http://files.katyschutte.co.uk/uploads/1/3/1/4/131452836/xupejujaloxomajegiva.pdf
    • http://files.broadwaykidsla.com/uploads/1/3/0/7/130776022/fotepoxutetep.pdf
    • http://files.wakevillagecogop.org/uploads/1/3/1/6/131606227/negonaresavijun.pdf
    • http://files.bethlehemctcommunitygarden.org/uploads/1/3/1/8/131871416/21d371b9f5.pdf
    • http://files.rafiahdance.com/uploads/1/3/1/1/131163712/jiviwakikolinex_fokeze_xuliporefa_kaxujiju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/24690130883.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/meijer_pharmacy_coupon_for_new_presc.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/xogir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/french_revolution_ias.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/windows_caps_lock_control.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/9004325615.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/jadisel.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/74773338346.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/puvezusimop.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9315/files/apple_tv_plus_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/2138/3333/files/23885031601.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/hi_rez_launcher_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/academic_essay_example.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_off000092af.bin
4b5e31641c1f19c046df0d83740cd2be27668d09440fe7cf547e90b7bafcf40f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AF 5864 bytes
font_01_sfnt_off0000a601.bin
7ee0a61511eda218a5cbad84dcf0f702819d30322aaf8aca595856ed2825816b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA601 11288 bytes

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