Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0a08e5922b1197…

MALICIOUS

PDF

49.4 KB Created: 2020-10-26 08:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: df48c78583bbe92fb6e66b5c26393dc3 SHA-1: df24e767591921383c32c9a1c2357b480e91dc6c SHA-256: 5b0a08e5922b1197796f7e9e7a39c40effdcdcf27284af1a9c1a95ac96ed428b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.link/123?keyword=affordable+android+phones+philippines+2020 In PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/b26496e1bc.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/6699016.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/8682544.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/jadurekofetuvedu.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/vowes_gogukugujiw_dejodoxezi.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/virepof.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/db56b385.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/2361736.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/1/0499/9233/5510/files/apposer_une_signature_sur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/rinufesoxuwinamunituf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/toshiba_canvio_slim_ii_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/xezedum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/fruit_of_the_loom_hoodie_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7371/5361/files/86356275432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0092/1764/files/dowuvapibabutidofedefew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9725/0711/files/fikifigokag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/cambridge_fce_practice_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/77551646458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8827f41a-9f34-468b-965c-903d36a051f1/73247396763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144d5f5e-6c60-4818-b01b-137aee446041/84108428301.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_off0000814e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814E 5532 bytes
SHA-256: 3fbf2986c94736faf406c3b0d0a1dcceb45ab2f712d04f5602cfe404df8bab96
font_01_sfnt_off00009416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9416 10532 bytes
SHA-256: f030e38431bbcfb133a11c925079ac020067e76206b777de2746baefcf44de2f

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