PDF malware analysis — malicious · d534c46eb5f6cbde

MALICIOUS

PDF

42.6 KB Created: 2020-07-31 06:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b4b0e8b856f61a1bbb9905235c00589b SHA-1: 610bfef7d009c62ce6235e7ffaa5d262477f4dca SHA-256: d534c46eb5f6cbdec6161622c02c0881b6c5fd818bc637e9e8483aca8612558b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or corrupted, preventing a detailed content analysis, but the presence of the malicious redirector is sufficient to determine the attack pattern.

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=acgih+2020+portugues+pdf
- http://files.gracemehm.com/uploads/1/3/2/6/132695560/xatuvi.pdf
- http://files.purrfectcup.com/uploads/1/3/1/6/131637529/sugazo.pdf
- http://files.pcconfections.com/uploads/1/3/0/7/130775619/taveleba_misup_xosagasovul.pdf
- http://files.pureblissbodyconfections.com/uploads/1/3/1/8/131856125/zadomazemel-midewoke.pdf
- http://files.justaboutpetswc.ca/uploads/1/3/0/7/130775690/jobaxarivurerigusan.pdf
- http://files.pureblissbody
- https://cdn.shopify.com/s/files/1/0431/9304/1053/files/95946799714.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
- https://cdn.shopify.com/s/files/1/0431/4356/1384/files/tovudedifufupa.pdf
- https://cdn.shopify.com/s/files/1/0440/5608/4630/files/64072827640.pdf
- https://cdn.shopify.com/s/files/1/0434/3644/1767/files/84982312362.pdf
- https://cdn.shopify.com/s/files/1/0435/7577/1304/files/kurunojajipil.pdf
- https://cdn.shopify.com/s/files/1/0437/3594/1274/files/79132487243.pdf
- https://cdn.shopify.com/s/files/1/0434/6377/0274/files/98323168071.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
- https://cdn.shopify.com/s/files/1/0436/4327/3369/files/37182809523.pdf
- https://cdn.shopify.com/s/files/1/0428/4206/3004/files/bovugogesosuvelaz.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000064e6.bin` `a231b3d2ee0970db8b84f7717f61d8f5d7515f35985bc506add5e0ba90849ea4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64E6	5216 bytes
`font_01_sfnt_off000076c9.bin` `4ca9683b9ddd5701d7fb38ba8aaa4b2722ebc00defc079e62f20d5985a4496ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76C9	11004 bytes

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