Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b948b04dd32bee…

MALICIOUS

PDF

54.6 KB Created: 2020-10-27 21:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ca902bf5307c3b27d8b0a1ae8add480c SHA-1: b639d040da278c6641304f8060a76da9f7f061ec SHA-256: d9b948b04dd32beecbd07815eb5c70759e1ba4fed6331ef1b8582c7e072236f6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=amc+mission+valley+20+weathering+with+you In PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/e13a1631.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/safiwun_pijoroxu_xurad.pdfIn PDF document text
    • http://www.opentle.orgIn extracted file (stream_005_off000086de.bin)
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007376.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007376.bin)
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/vuwogomudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8643/7270/files/19865571832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9026/8326/files/white_pages_west_sacramento_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2277/4180/files/free_printable_numbers_1-10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1977/1297/files/roluled.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/basic_grammar_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/kuwugajixenetifev.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/cat_s_eye_margaret_atwood_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/gaperugawi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/9632625501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/85447269470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/ino_yamanaka_cosplay_wig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2441/2572/files/9984759133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8153/8975/files/77623952223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0690/1405/files/how_to_feed_as_a_vampire_eso_xbox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/beam_bending_moment_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8118/0354/files/nizagolasukatasixof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6539/7414/files/blue_jackets_manual_20th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/books_on_history_of_pakistan_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/telugu_calendar_2018_october.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/anabasis_of_alexander.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/98181721465.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/wuwafugebilosa.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://www.gnu.org/licenses/gpl.htmlIn extracted file (stream_005_off000086de.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00007376.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000086de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x86DE 12204 bytes
SHA-256: 45ce23c7697394a80d4997d1fdb5a9e21d66fa094629c77593043818c6efc89a
font_00_sfnt_off00007376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7376 5728 bytes
SHA-256: faa43f0079032cde87910dd9361760ef070871bdeb5aaa638f7d5ea1303a7286
font_02_sfnt_off0000a94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA94F 10276 bytes
SHA-256: 966fe94ab4d6fb87599bfd1bf17c93dbce25d6dc11fc01941420dc700c02ff29