Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7c5159b8b4191b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-20 01:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01e35980c3e5f9b52f1910c623f43b9 SHA-1: 73830a5297c6c9cb179e47b8a251f0eb40f79479 SHA-256: 9d7c5159b8b4191be1ee99b31ebf4b88e04e23ace8ba6989c18577ab2f742365
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also flagged this PDF with high confidence. The document body, though corrupted, contains the URL 'https://ttraff.cc/pify?keyword=briton+2003+door+closer+data+sheet', which is likely used to redirect the user to a malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning technique to distribute the malicious content.

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.cc/pify?keyword=briton+2003+door+closer+data+sheet
    • http://files.artisansatlarge.com/uploads/1/3/0/7/130775934/255a2.pdf
    • http://files.williamsburg612.org/uploads/1/3/2/7/132712207/zevubisetobiv_razezodatodod.pdf
    • http://files.mifflinjuniataartscouncil.org/uploads/1/3/1/3/131381363/sivevof.pdf
    • http://lovib.galleherlumber.com/uploads/1/3/2/6/132682883/tavatozadujas.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/castle_in_the_sky_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/40152481244.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/wugiwovir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/dalaran_heist_guide_priest.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/52367784020.pdf
    • https://cdn.shopify.com/s/files/1/0437/6143/4773/files/deadpool_kills_the_marvel_universe_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/antibioticos_y_su_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/63730847835.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/25173953306.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/classic_armchair_3d_model_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/92195383886.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/18029674446.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_off00004e4c.bin
e00153125694f9cc3a1f010a5d823a6017ec2ec396d121523ed8cf5dc7a65812
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4C 5516 bytes
font_01_sfnt_off000060ee.bin
bef3316c5b85532d6af71bc2535956b215b7e4f0bfe6cabd49df65f8fa8a7cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 9868 bytes