Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafff66454f788c4…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 13:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24f29390c698d695bc4d0cecc7abdce SHA-1: 5929bcf5e1eb1d81d105ca54e989fee9e9b7ebcb SHA-256: aafff66454f788c49b61dcbc3082c413e5cb377c4e1cf756ff62efca52aa9df9
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ielts+academic+writing+task+2+sample+questions+and+answers+pdf', which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for SEO-based traffic manipulation or phishing.

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=ielts+academic+writing+task+2+sample+questions+and+answers+pdf
    • http://files.quinta-milhafre.com/uploads/1/3/2/7/132741535/637c13528c21adb.pdf
    • http://gakokis.crexcats.com/uploads/1/3/1/4/131407668/jabonuwazogenigalom.pdf
    • http://files.meccadance.com/uploads/1/3/1/1/131163634/8602183.pdf
    • http://files.amberleyseedlingtrees.co.nz/uploads/1/3/1/1/131164260/liwakunaf.pdf
    • http://files.icctexas.org/uploads/1/3/1/4/131407148/jomawanebamifi-fegisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/refuvurerelugumotuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/ladawutedujixatuwunuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/vubitogatex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/past_present_future_tense_verbs_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/dizirufujegotoxi.pdf
    • https://cdn.shopify.com/s/files/1/0445/7860/3167/files/maytag_3000_series_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/1697/3476/files/realismo_filosofico_representantes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/laser_star_projector.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/gepisaxekewunejigumebam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/dedewaxepaferuwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/86164935466.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/ados_2_autism.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_off000070bf.bin
e28a44daca3bb0ae926e4449149d5c0eef9f1bfb2d29f46b4af9584df9dbcb41
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BF 5708 bytes
font_01_sfnt_off0000841e.bin
5e757d197206779b4fa5094205c24d38bceae898b868d96e6d98db89afa64b29
pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 10288 bytes
font_02_sfnt_off0000a74b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA74B 4324 bytes