Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7ec0e49d5ba742…

MALICIOUS

PDF

41.4 KB Created: 2020-08-05 01:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c449b5cf79efaf2aca728b7893cba132 SHA-1: ce7f92f9b6a065eaf4d6f6150f5e49eac361ba6e SHA-256: 1c7ec0e49d5ba742e1a4801e864444c292b3a1164acddc66cd3ba3b8754b50ea
150 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'business budget template pdf', likely a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on Shopify, which is a common tactic for distributing malicious documents. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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.ru/pify?keyword=business+budget+template+pdf
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdf
    • http://files.bitsnpieces.ca/uploads/1/3/1/0/131069893/vageduzupalapur_zobawaporiwif_digojibolu_zabixaponega.pdf
    • http://files.americanpoolsrvc.com/uploads/1/3/0/7/130775222/d67813cef7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesuwalaloluxafim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/41446088187.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/paises_del_mundo_y_sus_capitales.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/dirt_off_your_shoulder_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/jowotezelorunemel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/kesezote.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/ranakozisegavinosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/50616847787.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/sozusuvinadivol.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_off000065d0.bin
9175c65eeb726dbf68543f63b034dae93e23d0242c97e7e983a78c2316495c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 5452 bytes
font_01_sfnt_off00007849.bin
b07e772f45f9b1cf0ad958fd53ff206a0a0c7a8ca9b6da9bad405040bfddea00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 9688 bytes

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