Malicious PDF — malware analysis report

Static analysis result for SHA-256 875c078c1aebf3b2…

MALICIOUS

PDF

61.7 KB Created: 2020-10-31 06:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3016bd54670f1f7baa0631b03efd31de SHA-1: c1b423890e5975c54d2e320a81005f2db1391554 SHA-256: 875c078c1aebf3b29bd0e183a3dcdebc6496841ac3dbd1b9f18091cfb20446c2
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.me/123?keyword=one+direction+mpreg+archive+of+our+own In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/145769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f912ed260af3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f955248ebe87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4653a3a9-3683-4310-b073-5f4c45d32f16/66456457845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3627/8425/files/ssangyong_musso_sports_workshop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77343376-dbed-4484-8af8-63e1fa01135e/build_your_own_clone_classic_delay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83014539-43e5-4765-ac5b-6896dfc0675f/popila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1263/6828/files/mccarthys_bar_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/93278326907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2948/6505/files/xapuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/rexusoriba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb53b2d9-3e09-4031-807d-ea8bf792c460/dajorelediv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1113/3599/files/scroll_100vh_on_scroll.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8543 13108 bytes
SHA-256: fb05e823f5f1b8aeaf70397486c0997ec8c326882008414cae0b4f900bf92c74
font_01_sfnt_off0000b015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB015 5536 bytes
SHA-256: f9a46e02f9e8805a09b092844499f9fc766c73d266d81a11ccb641d215820273
font_02_sfnt_off0000c2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D5 11900 bytes
SHA-256: 8d8265f839c6a3b42ccc7d842a19d70f234fd72f4c1e8f05791955518bcb4411