Malicious PDF — malware analysis report

Static analysis result for SHA-256 468b1b4827682e78…

MALICIOUS

PDF

55.6 KB Created: 2020-08-14 10:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85bac07636feccb061ec0e2289ed39a SHA-1: 746579f0c98401806b924eb939368c197cea23f1 SHA-256: 468b1b4827682e78be17e711cb136e750cf4d877c7ce0c06cf8cafd5049771a7
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=theeran+tamil+songs++starmusiq. The document body contains garbled text but also includes the same URLs, reinforcing their presence. The presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites.

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=theeran+tamil+songs++starmusiq
    • http://juwiresub.marina-wrestling.com/uploads/1/3/1/3/131383483/patudobude_tobesezixidug.pdf
    • http://files.naturecottage.com/uploads/1/3/2/7/132740873/mofuginakazagarali.pdf
    • http://namot.reillyontheisle.com/uploads/1/3/2/6/132696212/065cbd3d18.pdf
    • http://dulujoguj.udaratherapy.com/uploads/1/3/1/6/131637309/85f80f19e3c5.pdf
    • http://files.amargerycard.com/uploads/1/3/1/6/131637881/e1bc8.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/kuvodatavaduv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/tagalog_christmas_songs_satb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/94138568233.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/kotegosi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/signs_and_symptoms_of_schistosomiasis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/romeo_and_juliet_quotes_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/employment_termination_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/fezisimubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/81210947288.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/jixevujoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/pronoun_antecedent_agreement_worksheet_doc.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_off00008679.bin
9c1d15aafef5978b3c273cae9c1c9538d33b9298c1fe3f6242f03486c23cd36c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 5176 bytes
font_01_sfnt_off000097e2.bin
9688708e3b1362e2099116a0daea51c7afec6045cefebcf5b7e7741a411d24c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E2 11036 bytes
font_02_sfnt_off0000bc12.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC12 16164 bytes