Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c9ee13a50e73f1…

MALICIOUS

PDF

54.3 KB Created: 2020-09-30 03:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 78ad4acef635368182aaf1bd8e6eda5a SHA-1: 7ef7e4a65ea55432193852df1cc639ff823fc6c1 SHA-256: 26c9ee13a50e73f1898ee99a0483c8e5b9d25c49add65df097e314ce0790d999
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to lead users to malicious sites. The document body, though heavily obfuscated, contains text related to 'free fortnite accounts ebay' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/pify?keyword=free+fortnite+accounts+ebay In PDF document text
    • http://files.abbyweiss.com/uploads/1/3/0/7/130740551/litewigowaxunus.pdfIn PDF document text
    • http://files.bruceburrartist.com/uploads/1/3/0/7/130775498/wurebaba_mevupis.pdfIn PDF document text
    • http://files.solcriations.com/uploads/1/3/1/4/131453312/048e11ba.pdfIn PDF document text
    • http://nomukas.boozybotanicalskc.com/uploads/1/3/0/8/130873872/sewiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4cc629-63cc-4309-84c8-028bcc60b76e/45075238875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d534d100-851b-431b-95c5-7b5c8a8b07bf/nuxelenedezifofak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22758dbe-46ff-45d9-8de5-92b8e3a39970/93850132516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d399f944-801c-41da-8379-dd84a70931f6/sapowefoxaneterogeludilat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c8b5f3-a365-4076-903c-e04dadfb91e8/tujopibawifuzipowir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/ielts_simon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/abs_strengthening_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/motorcycle_trailer_hitch_luggage_rack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5806/1724/files/artisteer_4_standard_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/caisson_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/75979309780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/xezumuleboguvigozasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/my_tweakbox_app_won_t.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2390/0565/files/pazejo.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_off00009699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9699 5040 bytes
SHA-256: 6302b392a45bf89b1876d7a41dbf84f106a88532205d6564a544649de4ffcb97
font_01_sfnt_off0000a7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D8 10572 bytes
SHA-256: ed2a9f1706c4877e392821a6cb1353b2129ed8c1b6637271511dff79d4aefebf

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