Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f80def7d5b3a7d…

MALICIOUS

PDF

71.0 KB Created: 2020-10-27 23:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f813120ab02c3e203d9e23639b2ff6fa SHA-1: 4662fe40cd8adcad36e2d7485d2ce1e1a40fb443 SHA-256: 18f80def7d5b3a7d6c91694cd18db79c452ed6cc5ae1d697cbb791890087d55e
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=lg+washer+dryer+combo+manual+wm3477hw In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f8d4810b0fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f8bcdb1835b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8925a400351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f9049f8c8695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f8fb6a6c155d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5f92a0c872309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8746a77bf99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f94ef2aae3b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000d69d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000d69d.bin)
    • https://cdn.shopify.com/s/files/1/0482/5451/7410/files/el_eclipse_augusto_monterroso_analysis_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6137/3847/files/vevolosujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5699/4721/files/drastic_emulator_app_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1527/4147/files/panasonic_bread_maker_sd_2501_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/one_way_anova_test.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/narugifugukiwinazenopun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/psychotherapy_for_schizophrenia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3020/7400/files/tanokujebafove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/pobebupusexumatapofagoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8322/7823/files/lisibewupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/nefijadowiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/28033761214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7586/2173/files/fiwiliwifoxolowobeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/detugo.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 extracted file (font_01_sfnt_off0000d69d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000976f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976F 19636 bytes
SHA-256: 334501ae4303e8dc079ff9e8edb3157c3912dff24a1e05819ea64bb771e3854b
font_01_sfnt_off0000d69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69D 5960 bytes
SHA-256: 35a4e918e91fdc86654736f03fc3954f7efc0ecfe310654ab81da65d3836f733
font_02_sfnt_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 10412 bytes
SHA-256: 508f4578a967458eae1e787521568224b6d54bb406d9d482f223acbbadb49113