Malicious PDF — malware analysis report

Static analysis result for SHA-256 be37699fd749ca77…

MALICIOUS

PDF

52.1 KB Created: 2020-07-28 03:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0707e59044f615c986a7766c399694fc SHA-1: b33fe8f351ee739c2b2ac84714cdc1392daaf12a SHA-256: be37699fd749ca77cf88438eca9b63369d269ac70f40d0f06f06e6de95177403
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.cc', indicating a malicious redirector. The document body, though heavily corrupted, suggests a lure related to 'Soya bean production guide'. The ML classifier also strongly indicates maliciousness.

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=soya+bean+production+guide
    • http://files.myvacationcostarica.com/uploads/1/3/0/9/130969418/salamejewipo-zarutipatuwezu-gobidatewov-sivofuxuripuxit.pdf
    • http://files.oceanwisejourneys.com/uploads/1/3/1/4/131406606/zefoziwefubel_vaziwifer_lileseduvilewi.pdf
    • http://files.buildingbetterbonds.com/uploads/1/3/1/0/131070089/pogino.pdf
    • http://files.foundationsfirst-ni.com/uploads/1/3/1/0/131070112/8842460.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/96440828638.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/migavafujigodujegofag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/30433960605.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/32781388370.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/35706280353.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/jexefufigumitigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/muwawipakegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3865/files/18455917279.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/45915457359.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/pikuwovuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jumofukamex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/ralimamidore.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_off00008ddb.bin
cf1f5f8d587c84abef78b6e871ae917c6beb0fbabe9150419b3aa6d8df6beb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDB 5256 bytes
font_01_sfnt_off00009fbf.bin
1af1d35842c440d15218bb50145e2d3f08be4628e95c9c08ef0096f05e44dac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBF 10328 bytes

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