PDF malware analysis — malicious · df84991543a202ce

MALICIOUS

PDF

67.9 KB Created: 2020-08-04 02:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: af91cd4ab3a7f71274255d6ff3075182 SHA-1: 013a5b59206f56f78d3ca99ddb7a5d2d4f771a92 SHA-256: df84991543a202ce65854d08a2c3d3d023debee7d222706a598377a8d61f5d1a

150 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, suggesting a link farm or redirection scheme. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily corrupted, contains text related to 'hsc finance and banking book pdf', likely a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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=hsc+finance+and+banking+book+pdf
- http://files.simposiomujereslatinas.com/uploads/1/3/0/9/130969543/palav.pdf
- http://files.bobabobateabar.com/uploads/1/3/0/7/130775393/mewejikidekikek-pizoko-wesinexezutuwof.pdf
- http://files.lizhumestudio.com/uploads/1/3/1/0/131070894/24386ff32.pdf
- http://files.aubreymarieseader.com/uploads/1/3/1/0/131069987/tadat_velamigoverutan.pdf
- https://cdn.shopify.com/s/files/1/0429/6137/1290/files/nenifonomelaparegawoses.pdf
- https://cdn.shopify.com/s/files/1/0436/2112/2208/files/harbor_freight_hacksaw.pdf
- https://cdn.shopify.com/s/files/1/0437/0238/6856/files/subakowatusoluxukeb.pdf
- https://cdn.shopify.com/s/files/1/0434/3909/5973/files/fodokijune.pdf
- https://cdn.shopify.com/s/files/1/0433/7801/6406/files/pojozinonifemurawufu.pdf
- https://cdn.shopify.com/s/files/1/0437/0812/1242/files/73111785402.pdf
- https://cdn.shopify.com/s/files/1/0430/6554/0759/files/bixel.pdf
- https://cdn.shopify.com/s/files/1/0433/8260/3927/files/30724030882.pdf
- https://cdn.shopify.com/s/files/1/0433/5173/6471/files/glencoe_pre_algebra_workbook.pdf
- https://cdn.shopify.com/s/files/1/0433/6893/9672/files/mefamufufute.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_off0000b517.bin` `41fac9d4c5616e35eb87ee06c37d56c527e410a6279d572e69ce9a6cf0b52df5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB517	5360 bytes
`font_01_sfnt_off0000c766.bin` `0b03e3aca209df368100ec100df28adfc289c6a9b87e000f5eddc03b0e4db501`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC766	7352 bytes
`font_02_sfnt_off0000deb6.bin` `0935331103f3e78b89a7cdcc6328db2bd992b9e31eb2c388b30fe2716b7e9efa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEB6	10420 bytes

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