PDF malware analysis — malicious · 78a3a91ff6862d0c

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 19:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b9ac7bb550f59499f1f31aa6aac87684 SHA-1: 523ab61722a6da86ade8b7c5a001a52833e0105e SHA-256: 78a3a91ff6862d0cdfcc7f94149cbbdb7aadf3cd7adf825b3e1ad593cf6c36c8

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, indicating a link farm designed to obscure the true destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious redirector URL.

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=financial+statement+audit+report+example
- http://files.dotshallmark.com/uploads/1/3/1/0/131070792/dozalisipovabox_wugasami_valisemavej.pdf
- http://files.tomdangofficial.com/uploads/1/3/1/3/131380292/39c67ff54c820f2.pdf
- http://files.sugarmaplecharcoal.com/uploads/1/3/1/4/131407315/f43f682062e4dd.pdf
- http://jubam.shelbymbalik.com/uploads/1/3/2/6/132681670/nebavofedajekewer.pdf
- https://cdn.shopify.com/s/files/1/0429/1559/4393/files/arithmetic_of_binary_numbers.pdf
- https://cdn.shopify.com/s/files/1/0435/3723/6119/files/acuerdo_de_ginebra_1954.pdf
- https://cdn.shopify.com/s/files/1/0428/3973/6487/files/fitiwijirezoberetetuk.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
- https://cdn.shopify.com/s/files/1/0428/2833/3219/files/mcdonalds_coupons_ontario_november_2020.pdf
- https://cdn.shopify.com/s/files/1/0428/1312/8867/files/36936198968.pdf
- https://cdn.shopify.com/s/files/1/0428/1414/4675/files/34924895523.pdf
- https://cdn.shopify.com/s/files/1/0438/4060/2269/files/bestiario_cortazar.pdf
- https://cdn.shopify.com/s/files/1/0430/2359/7725/files/15499184166.pdf
- https://cdn.shopify.com/s/files/1/0428/0510/0707/files/xojuvuse.pdf
- https://cdn.shopify.com/s/files/1/0436/5156/3670/files/bm_das.pdf
- https://cdn.shopify.com/s/files/1/0429/0461/7119/files/37276061371.pdf
- https://cdn.shopify.com/s/files/1/0437/0379/5877/files/88390122161.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_off00005dfd.bin` `23ba2e43eb07d8b19d7432db16e3fd3a8e8b357922cff38aec3bdb9dd00278cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DFD	5240 bytes
`font_01_sfnt_off00006fb1.bin` `68df2b9e0071a5d8a016052c1dfa27112cb441f6c6173e446eaef16c65617c92`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FB1	10072 bytes

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