PDF malware analysis — malicious · 8302e555ca3f9a56

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 12:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a66e466714c720b90200a9556df72dc3 SHA-1: 7879bd58dde885233c08e7bcf91da5d2f49d216b SHA-256: 8302e555ca3f9a5653acf4645e02134ab2b1ef54c6dea84bae1d7faa368b7b34

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate document downloads, but one of the primary links redirects to a known malicious infrastructure. The ML classifier strongly supports maliciousness. The document body contains obfuscated text and embedded URLs, including a link to 'ttraff.ru', which is flagged as a malicious redirector.

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.ru/pify?keyword=mario+benedetti+cuentos+pdf
- http://files.mopswestchester.com/uploads/1/3/1/3/131379650/7722789.pdf
- http://files.buffalogroundhogday.com/uploads/1/3/1/4/131407315/zikuwazefeg.pdf
- http://files.zaratelabs.com/uploads/1/3/1/6/131636941/votow_niwuf_wevofonugan.pdf
- http://files.elsalvadortonawanda.com/uploads/1/3/0/7/130776611/5810954.pdf
- http://lojagik.thenewgrassroots.com/uploads/1/3/1/4/131482975/vojita.pdf
- https://cdn.shopify.com/s/files/1/0431/6073/1808/files/writing_numbers_in_words_worksheets_grade_3.pdf
- https://cdn.shopify.com/s/files/1/0438/0363/9970/files/baofeng_888_manual.pdf
- https://cdn.shopify.com/s/files/1/0432/2390/8520/files/sibefu.pdf
- https://cdn.shopify.com/s/files/1/0439/0024/0024/files/kideruxopenimuj.pdf
- https://cdn.shopify.com/s/files/1/0431/5018/0514/files/zetafafegatelosizag.pdf
- https://cdn.shopify.com/s/files/1/0433/7877/0076/files/nekadikusofegopidigojiwiz.pdf
- https://cdn.shopify.com/s/files/1/0427/7826/3718/files/kevoreronigi.pdf
- https://cdn.shopify.com/s/files/1/0428/8475/9711/files/gukize.pdf
- https://cdn.shopify.com/s/files/1/0437/6156/5850/files/93406531929.pdf
- https://cdn.shopify.com/s/files/1/0427/7751/0055/files/jurnal_akuntansi_perpajakan.pdf
- https://cdn.shopify.com/s/files/1/0431/4375/7985/files/valudoxudasizajib.pdf
- https://cdn.shopify.com/s/files/1/0437/0314/0506/files/52386369949.pdf
- https://cdn.shopify.com/s/files/1/0430/1327/5811/files/92237074998.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_off00005da1.bin` `ee57473341592db18ba2bd28d50616a2a81f77aff7846273d65c3d5228946e12`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DA1	5264 bytes
`font_01_sfnt_off00006f91.bin` `85ab498bef5e453c2926b7419285f3fc532fee060946a85eaad2a2ff050d67aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F91	9852 bytes

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