Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51410fac9721193…

MALICIOUS

PDF

46.8 KB Created: 2020-10-25 08:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 88cc6d6316b2ac089d839da40035c5ed SHA-1: 386d3b9578e87acab65b0b187a7a1966d41a34f2 SHA-256: e51410fac9721193d9ee0503e5f4756a0d56173683811cf6744a8b975b776b0f
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.link/aws?keyword=download+pdf+dictionary+english+to+urdu In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/doveredupunukanodip.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/9514745.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/51489.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007715.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007715.bin)
    • https://cdn.shopify.com/s/files/1/0502/5575/7467/files/maplestory_mercedes_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0483/7018/files/maui_jim_baby_beach_lenses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2227/6520/files/dakubo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/booster_pump_head_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/best_to_word_converter_online_editable.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/action_research_file.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/canaletas_para_cables_de_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb4786e-b98f-45c8-890b-67991573c01f/34609876493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc02922-9444-4657-86b8-9f9fc0325456/ark_sever_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdbe505b-046a-49eb-8394-8881de1dc230/86944135761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768739d5-0eb1-4a6f-9b37-987e0a98f725/71317777254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3a4953-b94e-4d46-8520-5f5b3022217a/92997581305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5460/7777/files/dawaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/completing_the_square_worksheet_algebra_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0487/6727/files/download_oxford_collocations_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/velelekez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/immersive_mode_manager_apk_paid.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/83895323732.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/luludelogolaw.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_off00007715.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 5612 bytes
SHA-256: d6385ac80554ef1b56799ab64b4d39bfeac1eaf968d86c00668c1c14b8425d49
font_01_sfnt_off00008a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4A 10340 bytes
SHA-256: 8129f43e1ae0d10a3ccd27766d96e9d2b6dbef0c699305dabd03bc14df0b197e