Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0492406273bd6d…

MALICIOUS

PDF

50.8 KB Created: 2020-08-05 04:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7489758446f40085e7f7274abe8f3a SHA-1: 18057a2ac6169e74c0e54f8597d6abc443429b6b SHA-256: da0492406273bd6dd0afa56521c090fe293e3bbbc552383225c277ed375546d5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic match for 'PDF_MALICIOUS_REDIRECTOR_LINK', indicating it redirects to malicious infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=mathematics+statistics+tutorial+pdf' is identified as a malicious redirector. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host numerous links, likely for SEO manipulation or to distribute further malicious content. The document body contains text related to a tutorial, and a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick the user into clicking the link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=mathematics+statistics+tutorial+pdf
    • http://files.reventnews.com/uploads/1/3/0/7/130775405/4096105.pdf
    • http://terolufir.sallieburrough.com/uploads/1/3/1/0/131070722/1901498.pdf
    • http://files.liferenewalcounseling.org/uploads/1/3/0/8/130813846/vubajaparetofiwot.pdf
    • http://files.alleghanygrace.com/uploads/1/3/1/6/131606854/wakelirulo_dumakufen.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/61632839050.pdf
    • https://cdn.shopify.com/s/files/1/0450/3542/1846/files/list_of_wcw_ppvs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/mawozimuwivaru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/wewetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/45264114826.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/runokete.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/80639064075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/56131415230.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4885/files/pagokepoxenad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/40428330468.pdf
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/3804841606.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_off00007b5b.bin
1ef42689cb0db9bd66b1849945862205146c496e764e32b06144ee92524bebb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5B 5176 bytes
font_01_sfnt_off00008cf4.bin
cf9dbb34831ba961df0a797c27924b5f2175928f716716d1734db6a7c22f8ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF4 10216 bytes
font_02_sfnt_off0000afa6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA6 4324 bytes

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