Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea31c5696aa8c88…

MALICIOUS

PDF

34.8 KB Created: 2020-08-03 07:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aca8299a58046f1eec688c7e46a13673 SHA-1: 3ba5de80487faa51c3cbfa8aeee287ca983628e3 SHA-256: bea31c5696aa8c88bb25e5aaa11d12c88551b8b19b6070158e885e18ee48d986
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 one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including one pointing to a malicious redirector, strongly suggests a phishing or malware distribution attempt. The document body itself is largely unreadable, but the embedded URL 'https://ttraff.cc/pify?keyword=homelite+weed+eater' is a clear indicator of malicious intent.

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=homelite+weed+eater
    • http://files.advance-biotech.com/uploads/1/3/1/6/131606261/9532301.pdf
    • http://files.emisprint.co.uk/uploads/1/3/2/6/132680869/95faf38d6d727b.pdf
    • http://gowore.davinciinitiative.org/uploads/1/3/0/7/130776486/7323826.pdf
    • http://files.michaelcmarshall.com/uploads/1/3/0/7/130739814/visexumivamu-pakuzit.pdf
    • http://files.fawkhamridingclub.com/uploads/1/3/0/8/130813645/sofavemobiruxe_poloso.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/tomifegagamotubutox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/gosetovun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/58091906252.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/vukikudekalasazisojigimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/43832400316.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/fuxus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/61174532107.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/tigatiseloluku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/82440566279.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/giropudig.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/94687628801.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/73951365884.pdf
    • https://cdn.shopify.com/s/files/1/0440/0617/8966/files/7162420542.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_off00004bdc.bin
e2a1b2182cb154d8b5e430644229328a70ec5101a803b7011920a02659b4f671
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDC 4848 bytes
font_01_sfnt_off00005c45.bin
1a6505636114cf66e8db33065bf6f41e5fc4a4a6afc9f10fa910e11fac717af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 10108 bytes