PDF malware analysis — malicious · f8335b41ca33c01d

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 07:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bf134ddf8e43cc407056f396dcf2b980 SHA-1: b5df5facfe594d0d2fb9de339ea07fe59962c97c SHA-256: f8335b41ca33c01d9da17089afe0c7f3a638370a4fe53b25f166ddc4bbff67c5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting an attempt to disguise the malicious intent as educational material. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector and a link farm suggests a phishing or malware distribution attempt.

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=graphing+nonlinear+functions+worksheet
- http://files.lostangles.com.au/uploads/1/3/2/6/132695629/21ca6d03f.pdf
- http://files.marieandcharlie.com/uploads/1/3/1/8/131871614/pazese-jefumuposi-bonibusulage-mukelezenenavu.pdf
- http://files.dolphincircle.org/uploads/1/3/1/4/131413550/05123.pdf
- http://files.britishjeep.com/uploads/1/3/1/4/131483110/7730540.pdf
- https://cdn.shopify.com/s/files/1/0435/2756/9576/files/53940273194.pdf
- https://cdn.shopify.com/s/files/1/0429/0763/1783/files/fovobonesik.pdf
- https://cdn.shopify.com/s/files/1/0430/6645/8265/files/manalavev.pdf
- https://cdn.shopify.com/s/files/1/0435/2756/9576/files/adjektivdeklination_b1.pdf
- https://cdn.shopify.com/s/files/1/0437/5383/2609/files/phonetic_alphabet_file.pdf
- https://cdn.shopify.com/s/files/1/0430/9703/0817/files/zazonuzijar.pdf
- https://cdn.shopify.com/s/files/1/0432/7096/3350/files/40133781684.pdf
- https://cdn.shopify.com/s/files/1/0435/6397/4805/files/82165210162.pdf
- https://cdn.shopify.com/s/files/1/0427/9150/1990/files/android_version_8._1_go_edition.pdf
- https://cdn.shopify.com/s/files/1/0432/3786/7687/files/wamira.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_off00005ec1.bin` `966795892cbb8e241ae62addc37f4b24fb79412245dcbb63e69ed8842451beea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EC1	3076 bytes
`font_01_sfnt_off00006bac.bin` `4d5ceec157d4c22e81c8216b0055442142a122001f447f6d3f9e39990fbc96b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BAC	5464 bytes
`font_02_sfnt_off00007e59.bin` `9295d1bc7e8ac6e187b840f4a43e59e989372e05212fd35dbb6428991d398a71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E59	9856 bytes

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