Malicious PDF — malware analysis report

Static analysis result for SHA-256 6279649fba14ea1f…

MALICIOUS

PDF

48.1 KB Created: 2020-10-27 12:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fe3211c18b6e6b7fc9725e13308d2798 SHA-1: 47e05be30602670c51a0c609592e93719ccc0dd6 SHA-256: 6279649fba14ea1fc0414e643750167814298423eda5e28cdeaa065e73bd259b
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=lyrics+to+the+fresh+prince+of+bel-air+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8a03f748f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f87d31911de8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f919054a3af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8716af85e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f97492c589aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f8ea737db2d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f8ccb14e0cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f964a3f2e69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5f91ee2e7d147.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e02.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e02.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a4c4.bin)
    • https://s3.amazonaws.com/vezumobigodub/rizulojem.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/tobapewotipabale.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/lodofaxoxazajeromi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/tawupusododasos.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pukovarofokarofot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9248/3490/files/google_translate_code_in_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8669/4550/files/strange_aeons_players_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8887/8012/files/affirmative_and_negative_informal_commands_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8147/2929/files/peleas_de_animales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8521/0802/files/69142992672.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/kuzogenexoxetufekonirukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/dazipeluzenumovinuzinup.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/atomic_structure_class_11_notes_in_hindi.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_00_sfnt_off00006e02.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5280 bytes
SHA-256: 14ee571635f28fd6ee122d68a25830a09de6900c674efe67a6660572839f83ef
font_01_sfnt_off00007ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF4 10800 bytes
SHA-256: bad1272ed5572885e838abb6776e161bc147f8ff3322ee3b5dd4d18e200c812a
font_02_sfnt_off0000a4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71