Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3175ae0bb2b1ece…

MALICIOUS

PDF

52.4 KB Created: 2020-08-13 00:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97e52ff05cecaf7f36b9d77c421c63af SHA-1: f003e54539b7cb13b2a1eb42f6b4ff8d3a387288 SHA-256: f3175ae0bb2b1eceef4cece8f446cb79bc8a2bb6c8cd93c56c3e5b8f49079587
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources disguised as academic documents. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure victims with a "bsc second year chemistry book pdf" keyword. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the extensive link farm and the malicious redirector strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=bsc+second+year+chemistry+book+pdf
    • http://files.mustafaclub.com/uploads/1/3/1/3/131383512/fuwugunexe_sexos.pdf
    • http://gurilago.bigchipsinvestments.com/uploads/1/3/1/0/131070420/sifusepoj-dubidonumiv-xurikowofipete-xukofo.pdf
    • http://miwosus.saulsandalusians.com/uploads/1/3/1/0/131069839/funegude.pdf
    • http://files.halfpricefurnitureandmattress.com/uploads/1/3/1/4/131406861/nujotedid.pdf
    • http://neriw.bagusnugroho.com/uploads/1/3/2/8/132814930/jakujeni_tukedanijawap_vojedomanilul_lekix.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/vigejede.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/guzokax.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/febixudidilinozunarafupan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/69314868044.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/55497515480.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2631/files/junimo_hut_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/pakinasanewezod.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/6137515266.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/3422427832.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/126348161.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/vimexamezaloj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/19887018466.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006101.bin
42387d38aedb0f2454cd36d864e9d39a6432d526a8f7a480bbd8ccfd9e528465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 5720 bytes
font_01_sfnt_off0000743f.bin
a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 3204 bytes
font_02_sfnt_off00008132.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 2320 bytes
font_03_sfnt_off00008b85.bin
40407b2f674829219100177c43fd5b83e280acff96688b4c7d72273718a6c4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B85 10044 bytes
font_04_sfnt_off0000addc.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADDC 16224 bytes

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