PDF malware analysis — malicious · accf0473cd2d8099

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 15:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b053bb84c1ca379645b746980a4986c3 SHA-1: 9192a197e12273633b1a46268c78426955f77949 SHA-256: accf0473cd2d809903e94a817f29be6310fd663e44c6bbd57a8bb1bea96e0d09

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 a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=anemia+definicion+pdf, is identified as a malicious redirector. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious content. The ML classifier also flagged this PDF with high confidence.

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.com/pify?keyword=anemia+definicion+pdf
- http://files.mainstreetenid.org/uploads/1/3/0/8/130874077/541988.pdf
- http://files.juneauflukes.org/uploads/1/3/1/3/131383821/giwutosulaf_mufiga_sumuwa.pdf
- http://files.sandaharrboerboels.com/uploads/1/3/0/7/130775413/5839619.pdf
- https://cdn.shopify.com/s/files/1/0432/1381/5966/files/tic_tac_toe_svg.pdf
- https://cdn.shopify.com/s/files/1/0431/9097/6673/files/tamegusidemojafupawep.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
- https://cdn.shopify.com/s/files/1/0435/1708/3802/files/39183555151.pdf
- https://cdn.shopify.com/s/files/1/0432/8852/7013/files/gifilejepekib.pdf
- https://cdn.shopify.com/s/files/1/0431/2930/7296/files/gimubesutuwuzebep.pdf
- https://cdn.shopify.com/s/files/1/0455/6272/4517/files/amadis_de_gaula_completo.pdf
- https://cdn.shopify.com/s/files/1/0433/1814/9285/files/ninutudidumopororijaro.pdf
- https://cdn.shopify.com/s/files/1/0434/2402/2677/files/refuvurerelugumotuz.pdf
- https://cdn.shopify.com/s/files/1/0433/9469/5324/files/irc_change_nick.pdf
- https://cdn.shopify.com/s/files/1/0429/8863/4263/files/dozurexavuvete.pdf
- https://cdn.shopify.com/s/files/1/0435/4657/5016/files/jspdf_autotable_hooks.pdf
- https://cdn.shopify.com/s/files/1/0431/8344/0030/files/diwotaperex.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000065e0.bin` `a318c64dce8b720fef61216c9c0223ceb019adaab01df435258df1dacde9d008`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65E0	4692 bytes
`font_01_sfnt_off000075ad.bin` `fb226527a9618103a4a9443e190a8c3ddfd934f2e67078f1d12da7eb4491e5ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75AD	10704 bytes
`font_02_sfnt_off00009895.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9895	4324 bytes

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