Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ed4d5fd5f3c4b7…

MALICIOUS

PDF

45.2 KB Created: 2020-09-01 12:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95b7dc802a1a36194378e0641d31fde SHA-1: 1bb2b5f599d97844f495935310daa7647f8f1651 SHA-256: 89ed4d5fd5f3c4b7be3c57f49babbe0e6740857e789ed19691a490e565d6a35c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL `https://ttraff.cc/wix?keyword=schistosoma+haematobium+pdf` identified as a malicious redirector. The heuristic `PDF_SEO_LINK_FARM` indicates the document's purpose is to host numerous external links, likely to manipulate search engine results or direct users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=schistosoma+haematobium+pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/39019252969.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/d20_modern_character_generator.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/11870581242.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/24558956223.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/punanuwolat.pdf
    • https://static.usrfiles.com/ugd/f0f215_6a62c9fee32f47d7bcd8694ee0528e33.pdf
    • https://static.usrfiles.com/ugd/b8c837_5109253166b049b291c4531faa663632.pdf
    • https://static.usrfiles.com/ugd/9b5f63_778d17fa71284e2a839c53d4026d8c04.pdf
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/preeclampsia_management_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0461/9907/9065/files/everlane_international_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/birthday_invitation_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/1484/7655/files/bidusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/jerened.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/hanon_doll_sewing_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/74487622506.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/77841113467.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006605.bin
3e38b1bdf17fa034f15e7c032640c1e2bd428e3fbdae59a8bc43fb5e83bd5b00
pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5284 bytes
font_01_sfnt_off000077ec.bin
a45def35eefda62306fa35b03550ff40611c8cd55f0fdeaa081566c2fb50d14d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EC 9876 bytes
font_02_sfnt_off000099c6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x99C6 4324 bytes