PDF malware analysis — malicious · 37b021bfd72a22b1

MALICIOUS

PDF

53.8 KB Created: 2020-07-28 22:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9ecaa0231a3be533f30db9f36a026895 SHA-1: f1a8cc4c08e1ea05866d8cce8dfd2cb80a17cc64 SHA-256: 37b021bfd72a22b1e68e526e2d83b62bd1c5de4434475b6e6f29f49a56859b88

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a significant number of embedded links, identified as a link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous links, including one to a redirector, strongly suggests an attempt to direct users to 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.com/pify?keyword=paint+shop+pro+free++windows+7
- http://files.pettelleprice.com/uploads/1/3/1/4/131438629/c9418f63.pdf
- http://files.graceandtruthministry.com/uploads/1/3/0/7/130775021/xerededur.pdf
- http://files.dchealthchiropractic.com/uploads/1/3/2/6/132681392/pugefadanofelaporaj.pdf
- http://files.fremantlewaterbeads.com/uploads/1/3/1/3/131380875/51acd.pdf
- http://files.edcmissouriflatupdate.com/uploads/1/3/1/4/131414240/7325938.pdf
- http://files.fremantlewaterbeads.com/uploads/1/3/1/3/1313808
- https://cdn.shopify.com/s/files/1/0429/5252/3929/files/wofiwewedevurelawedowi.pdf
- https://cdn.shopify.com/s/files/1/0430/3575/4650/files/ruwixod.pdf
- https://cdn.shopify.com/s/files/1/0431/9353/2573/files/dotuk.pdf
- https://cdn.shopify.com/s/files/1/0430/6518/0321/files/39033914674.pdf
- https://cdn.shopify.com/s/files/1/0437/8004/7010/files/folutifidajowevere.pdf
- https://cdn.shopify.com/s/files/1/0429/6795/7660/files/paliniz.pdf
- https://cdn.shopify.com/s/files/1/0430/3595/1257/files/lozarorumopo.pdf
- https://cdn.shopify.com/s/files/1/0432/3760/5544/files/90576633045.pdf
- https://cdn.shopify.com/s/files/1/0435/5276/8151/files/desedokokofowovubumal.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.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_off00007a55.bin` `4589bb593e8a09204715b78f4e1e0b0e665fd7528ca264518bba54c38d6f53c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A55	7660 bytes
`font_01_sfnt_off0000941b.bin` `e4a2db2411ffd51c4cd8e36e214fcbceaf1c22a6e63f64afb65ca63d5cb3adad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x941B	5056 bytes
`font_02_sfnt_off0000a550.bin` `4bad3fe050abc882bf8cd6b61ff9392be1ad18613714d82ba518d3aa787f28e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA550	10516 bytes

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