Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a24ddea54dafb60…

MALICIOUS

PDF

45.6 KB Created: 2020-07-18 20:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb8dcdb207fb7fdd8b47d5c371d32b3e SHA-1: 9aac2b6723eb9b2feef7d7ba0559ccd77e4f2c39 SHA-256: 3a24ddea54dafb60e15bdd7affb65c9246377a57bb1e61920919ada337e3db4c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to job applications. The presence of numerous external PDF links, including one to 'cdn.shopify.com', indicates a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/wb?keyword=exemple%20lettre%20de%20motivation%20candidature%20spontan%C3%A9e%20pdf
    • http://files.trackingclubofma.com/uploads/1/3/1/4/131454034/6427131.pdf
    • http://files.jennajordanart.com/uploads/1/3/2/7/132740458/bizekidixiwuvi_zazenuvofabiz_werosa.pdf
    • http://files.tutleymutleytextiles.com/uploads/1/3/0/7/130739802/3374337.pdf
    • http://files.anoopbrar.com/uploads/1/3/0/9/130969974/vanolimiz_finujadoxulazal_kuledi_gavunorinevede.pdf
    • http://files.tutleym
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/tikidid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/73551155809.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/pewowixenunabafugav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/fezadobokovujovonuvel.pdf
    • https://fexutat.files.wordpress.com/2020/07/gadabedunuboli.pdf
    • https://bilivogeji390496675.files.wordpress.com/2020/06/70456372783.pdf
    • https://fitapozuwox.files.wordpress.com/2020/07/rexikugutozasiganugubuti.pdf
    • https://voxumip.files.wordpress.com/2020/07/pewevaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/78959259818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/20312648602.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/xukadadilaxuniz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/ponemabejezosiguxapatoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/98600168732.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/menutewaparogiwul.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/36479682577.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_off0000703b.bin
82104a02ed1811c24d80948e1ca3f4da5519a8a31aba130ec4a27e566c88f4ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 5408 bytes
font_01_sfnt_off0000824b.bin
dc8fcf100005c07dd5e4f5e1803f305dea8698089ef4bfeea63f4c1a81f9ab81
pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 11540 bytes