Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ae47d4bebd81cb…

MALICIOUS

PDF

53.3 KB Created: 2020-10-09 02:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bbb495dc5f4d5071e823334dfb11811d SHA-1: 043d2613f9ef7d4947cdf1afbf16af49b0a2345a SHA-256: d9ae47d4bebd81cb6f3180993421ada145254e75e9be0825edc317cbf5d09b41
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=imperialism+in+japan In PDF document text
    • http://zoxuf.saintpaulstrong.org/uploads/1/3/1/6/131637257/4368955.pdfIn PDF document text
    • http://ruvakog.breemcewan.com/uploads/1/3/0/8/130874019/082ada7f1b9c71.pdfIn PDF document text
    • http://files.bringalessiahome.com/uploads/1/3/1/6/131606169/vokujan.pdfIn PDF document text
    • http://files.rcrequestrian.com/uploads/1/3/1/3/131383813/zavugufepas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8161/6546/files/8281233732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/honda_gc160_pressure_washer_pump_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/bus_crash_101_san_francisco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4907/3312/files/56873342364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/52059255590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/quick_shortcut_maker_apk_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/37728580289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4565/3160/files/zeniseboko.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000949e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x949E 4976 bytes
SHA-256: bed91a7e5ffe2c6a8073c3b89fa573b4f92ac826fe1df73059a888621335fd84
font_01_sfnt_off0000a56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 10424 bytes
SHA-256: 931ee243c940aa6288989c427be22cd5747567e4fc8b612c7ef7724b54d209d1

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