Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88542a1c23f0a82…

MALICIOUS

PDF

40.6 KB Created: 2020-11-02 10:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 059c3d1ba577c279f81860af1d1381ad SHA-1: cf2a135b0fc46cda56921feb9e29035e528a796b SHA-256: e88542a1c23f0a8256ae6c20139269dfec89997969d2541bc2137fa2f6155bf4
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.cc/123?keyword=franklin+treadle+sewing+machine+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8ccbe8dc62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5f9ecb89c1eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f881499a923d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f8f5a88da99b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f975711eadf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f98e996c8b70.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/1/0501/5089/9873/files/fallout_shelter_cheats_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/tatomuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/8053/7003/files/schwinn_bike_speedometer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/7558/9032/files/free_kitchenaid_dishwasher_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/folidawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9023/8368/files/muzigin.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_off00005ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 5464 bytes
SHA-256: 504bad804d0a5adf8c5b3e7f8f4ddb0328e4799aa813d8cdd0b16421acc2a37a
font_01_sfnt_off00007279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7279 10376 bytes
SHA-256: 166308b7217891999c2d1c58e3b7a93bb6165cdc86d6b4e0dcbe20f74a0c7ccb