Malicious PDF — malware analysis report

Static analysis result for SHA-256 e395f00bbb92fa9e…

MALICIOUS

PDF

41.8 KB Created: 2020-10-29 20:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: edb67ccbff72b74ddf7bf9fc6786f282 SHA-1: 21b6884f93d21a3035929e1df2e255c01e502db1 SHA-256: e395f00bbb92fa9e21bae1ef4a0380d77f526872da81c702300ecc2d8b6cbce1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a large number of external links, including one pointing to known malicious redirector infrastructure. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise malicious content. The primary goal appears to be directing users to potentially harmful websites through a link farm or redirector.

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.ru/123?keyword=i2c+vs+spi+distance In PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/8542911.pdfIn PDF document text
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/tokufurixujexoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f8e05d655e30.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/mosijamimin-mifikod-viwizajavepiru-pevuzaniridix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5f99bf5713287.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.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/1/0431/8950/2110/files/binajijozulemokepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9074/2948/files/zalapebikizujawawuwete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7093/0075/files/make_money_online_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3283/6768/files/soririnovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a097d36-d721-4935-baa8-30b4b81012ba/penukugafexipazuvunese.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_off000066e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E2 5068 bytes
SHA-256: 118a4e8806165d89640f44fe53e88f760d87fdf5e468206bd5069aac7e8ae789
font_01_sfnt_off0000783e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 10284 bytes
SHA-256: 84154c4fff7f1b09b4d8e05f9e06d6e3a3d520309d1a4930831d5458001c2408

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