Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7f85fbd6bdd1da…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 01:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e07b01b422791f7e41ddfb537c6f2a17 SHA-1: 349989539b1347eb77d9abace1ff1dbdbc4f4b8e SHA-256: bb7f85fbd6bdd1da5ba75ae570f73b1ff516ea39f15b98fa76da1fd95f817229
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.cc/pify?keyword=aqa+a+level+psychology+textbook+pdf In PDF document text
    • http://files.augustinegroup.ca/uploads/1/3/1/4/131437476/vopadofudugakesu.pdfIn PDF document text
    • http://labaw.carpetcleaningmontecito.com/uploads/1/3/0/8/130874620/81f922865e.pdfIn PDF document text
    • http://files.judyandjonathan.com/uploads/1/3/0/7/130775154/5840634.pdfIn PDF document text
    • http://files.azshaolin.com/uploads/1/3/1/6/131606257/juvekolipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/xesavewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/milakumegigugilujezuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/88286527190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/tuzazejowut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/rewifagudibawumazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/9085354682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/83232324636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/58720033087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/nba_2k17_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/alimentacin_consciente_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/testo_550_manual.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4735 5868 bytes
SHA-256: d01bc9abe2ac0bac8bd19a3e5f588d0201ca14cf7b97390a7502a6ff5da8bd14
font_01_sfnt_off00005b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 9692 bytes
SHA-256: 93437cc2367ecd73d6417983e693914832e91bb908e1dd0ca34316cf40b06276

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