PDF malware analysis — malicious · fa43469068ee6c9b

MALICIOUS

PDF

52.1 KB Created: 2020-08-11 16:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4c6e9c548d3aefa2ec6e19655897b3ab SHA-1: 80ff8df1c87578c5c7b2f23ba740665baa945106 SHA-256: fa43469068ee6c9bfc8a4c701f1557f3b30cf369445f832e890ecd61d3c98180

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=bsc+medical+microbiology+syllabus+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to a syllabus and the redirector URL, suggesting a lure to a malicious site. The presence of numerous links indicates a potential SEO poisoning or link farm tactic to distribute malicious content.

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.ru/pify?keyword=bsc+medical+microbiology+syllabus+pdf
- http://files.conniesscreations.com/uploads/1/3/2/3/132303359/povabenena.pdf
- http://files.woodlandharvest.org/uploads/1/3/1/4/131437878/5734400.pdf
- http://wixeliw.readingsync.com/uploads/1/3/0/9/130969742/0e8446e69ac2.pdf
- https://cdn.shopify.com/s/files/1/0436/3013/3406/files/55430775619.pdf
- https://cdn.shopify.com/s/files/1/0436/4537/0528/files/penaritogijifafeb.pdf
- https://cdn.shopify.com/s/files/1/0437/2060/5848/files/25207204523.pdf
- https://cdn.shopify.com/s/files/1/0435/9385/9231/files/tepepagadovelajeneru.pdf
- https://cdn.shopify.com/s/files/1/0433/7732/8278/files/nubinowikivokonejawixa.pdf
- https://cdn.shopify.com/s/files/1/0429/9961/1553/files/luvinikuzulaniwedib.pdf
- https://cdn.shopify.com/s/files/1/0435/7410/0127/files/sojamaganutakaxi.pdf
- https://cdn.shopify.com/s/files/1/0430/7661/6346/files/tukibumurukenagugig.pdf
- https://cdn.shopify.com/s/files/1/0432/9046/0324/files/uric_acid_test_kit.pdf
- https://cdn.shopify.com/s/files/1/0427/7580/6119/files/89209525336.pdf
- https://cdn.shopify.com/s/files/1/0440/8265/9493/files/78349072216.pdf
- https://cdn.shopify.com/s/files/1/0433/9744/7836/files/nioh_trophy_guide.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
- https://cdn.shopify.com/s/files/1/0431/5725/8395/files/48734230951.pdf
- https://cdn.shopify.com/s/files/1/0436/3298/4222/files/58326629726.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_off00008c2b.bin` `f5bdedd1f09d3073f3bc47fcdbd07bd5527f5f05c85df6e1f1d2edabecf24bdb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C2B	5768 bytes
`font_01_sfnt_off00009fa9.bin` `e5d6d55c285cd7f79d6543df8491718e5a3780918241d7028df2e9b23af13b36`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9FA9	10312 bytes

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