Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87882e8745fc78d…

MALICIOUS

PDF

61.9 KB Created: 2020-10-20 18:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 1e351fedf2959b2113951bcc4977b039 SHA-1: f465913cac7609016d5c87767ea0b4d9a1dae057 SHA-256: e87882e8745fc78d94e66f5551adcd6ec959cbac660230c1655260434433247a
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://gettraff.ru/pify?keyword=.net+architect+interview+questions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f88ffec846d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f8e493e729a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87080030f55.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000b3c4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000b3c4.bin)
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/perimeter_composite_shapes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0976/8086/files/geometry_chapter_7_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1035/7913/files/daily_devotion_for_youth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5019/6903/files/1633936612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/jedaxivijatokamu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/zisenogoxuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kukipipemopasojibufal.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/kivuworizi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/juvunikumon.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vinilepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/sulenaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/freeway_fury_2_tyrones_unblocked_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/beats_bluetooth_speaker_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2782/3264/files/47595728517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4059/3860/files/lebakatutukamabofunol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7608/4646/files/noble_gas_configuration_for_chlorine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/dfas_form_9098_block_29.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1232/8094/files/banger_racing_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5966/1985/files/40286011171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3382/0836/files/escape_from_camp_14_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8718/8134/files/river_soccer_club_tournament.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_off0000b3c4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C4 5424 bytes
SHA-256: 88236daf50e9dececcc3fc8a15b0dc25b05d7d877658f69fd19f918858406e2d
font_01_sfnt_off0000c642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC642 10408 bytes
SHA-256: 6e8a3896f9608ed7511aaca8827282ef30c702245fcd3e70e5f727062d8b4c1e