Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e3c60e6289a31a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 06:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a439f416b1dc0d4720847e1e71329c SHA-1: 2d7468e1fe89862f55b5bda7b57b4defe77991bd SHA-256: e1e3c60e6289a31ab880a103fb71163ba7ae360ff006ead393407bf080cb0dcf
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to PDF translation, which is likely a pretext to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL indicates an attempt to lead the user to a malicious site 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.cc/pify?keyword=como+traducir+un+archivo+pdf+en+ingles+a+espa%25C3%25B1ol
    • http://batuju.bcschooltennis.net/uploads/1/3/2/6/132681556/gugimaxu.pdf
    • http://files.driveinbiblechurch.com/uploads/1/3/1/8/131856288/vebugajuboro.pdf
    • http://fikanoteb.avatamsaka.ca/uploads/1/3/1/6/131606490/jefis_vewimenuse_wixevega_lifodizova.pdf
    • http://files.inspiredhouseplans.shop/uploads/1/3/0/7/130775180/6816222.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/gasonamudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/approaches_to_psychology_glassman_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/45983123177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/752843987.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/21189779448.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/zoxutawepabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/bupezenuviforajowutifune.pdf
    • https://cdn.shopify.com/s/files/1/0437/0219/0235/files/spinning_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/remukosatobanad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/89557847925.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f44.bin
e958ff3fc30443eb015919f5bc0459bb5049ed8af0cd801ddc923e83f1aea3f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5748 bytes
font_01_sfnt_off00007277.bin
8130fb68d72abbdf45328ead499286a89d2484d10bbfd12603e9b0b6352b7be9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 10868 bytes