Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa2a02e2760a1ad…

MALICIOUS

PDF

57.8 KB Created: 2020-10-20 10:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b40b31b81787d7264d2fd6ee0cdf247c SHA-1: e5c13c1be1783391d90977b6541108fd56aa836c SHA-256: bfa2a02e2760a1ad2cafafacff17623a046d5b3ca420d3fc617adc74712987a4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious Weebly domains, indicating a link farm designed to host malicious content. One prominent URL, 'https://ttraff.com/123?keyword=open+office+pr%25C3%25A4sentation+pdf+einf%25C3%25BCgen', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary purpose is to drive traffic to these malicious sites, likely for further exploitation or phishing.

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://ttraff.com/123?keyword=open+office+pr%25C3%25A4sentation+pdf+einf%25C3%25BCgen In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/jixebezenefelod.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/8cc36c2f6925c.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/e7ec98a008.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/fodosafewazafa_lepinazo_komobege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8cfa24acefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f8e0158b87e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f872f9c660d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f89f63f58a8c.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/1/0504/2064/6048/files/global_theme_store_miui_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3177/9738/files/protozoos_caracteristicas_generales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1806/8383/files/ios_11_music_player_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4319/5542/files/nikatujewuxuzupuzodewaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/hauppauge_wintv_8_serial_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06711dce-87f7-420e-8cf3-32053a54bf0e/58240374587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314631cc-f34b-4b3e-b922-9103b74409d0/52370295015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/hand_lettering_books_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8037/5211/files/44580373450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf15dc3a-b6ea-45fe-8261-bd69e61fbc10/gosutogepukafixanumawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba915a0-2cc4-42d5-a4ac-dc5859dc0696/new_gundam_breaker_patch.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_off0000a0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D9 5676 bytes
SHA-256: bc84246e05a124cab9380f35f732d914110298bf74762c0bf9cec50d13663e88
font_01_sfnt_off0000b363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB363 11240 bytes
SHA-256: 12fe72408205838d92f2c5414ed8c844915055875835024747eadd95c0e99ad9

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