Malicious PDF — malware analysis report

Static analysis result for SHA-256 3585ce4cc2743f3f…

MALICIOUS

PDF

33.2 KB Created: 2020-08-11 06:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ff63f775a77aebb20869135b538404 SHA-1: 632c64580053114174de43293ceec0b9b7c0359b SHA-256: 3585ce4cc2743f3fe7652cb3b3c61ef83cc9576e9e142af0019e6e94187b440e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=cambridge+a+level+psychology+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to academic material and the malicious URL, reinforcing the lure.

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=cambridge+a+level+psychology+pdf
    • http://files.rltennis.ca/uploads/1/3/1/4/131437669/xemejexanutaj.pdf
    • http://files.outbacktherapy.com/uploads/1/3/1/4/131437093/pokejivapofewe.pdf
    • http://files.cfssb.org/uploads/1/3/1/6/131607635/berebole-rokabi-fijigari-petula.pdf
    • https://cdn.shopify.com/s/files/1/0449/8790/8264/files/ejercicios_de_quimica_organica_alcanos_alquenos_y_alquinos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/mmpi-_2_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/nigupawufigebizesewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/tutorial_de_autocad_civil_3d_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/8641/9870/files/zoselekijijaloro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/vogenutojovutadumuseji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/95701631319.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/bufuninex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/99634200244.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/86660795052.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/nazonaripog.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_off00004540.bin
ab2674888eed2b16804449e493b260a286ef06e48bc8b1c1324b710996a79fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4540 5776 bytes
font_01_sfnt_off000058cb.bin
d5b79be21352ff3213e2171d9ad92002277fe31d70196b5cec51c3abbe597bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 9252 bytes

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