PDF malware analysis — malicious · c1913fa2088ae1c8

MALICIOUS

PDF

48.9 KB Created: 2020-07-27 01:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9420d2b3ac255df6fb594a767c7bf8eb SHA-1: d7c06b334e9bc024413074cf9b3d0a5268904663 SHA-256: c1913fa2088ae1c89676ce56219815f1688d1b8276bd673f73ac12b2dc68c819

128 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a lure related to 'redundancy letter template hk' and embeds numerous links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to funnel victims to further malicious content. Another heuristic flags a large number of external PDF links, suggesting a link farm for SEO poisoning or traffic generation. The document body, though heavily obfuscated, contains keywords related to the lure.

Heuristics 4

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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=redundancy+letter+template+hk
- http://files.labcharter-pto.com/uploads/1/3/1/3/131379434/4b32ad6.pdf
- http://files.zamjesuitscovid19.org/uploads/1/3/1/3/131382387/rewifat.pdf
- http://files.palermiscollection.com/uploads/1/3/1/1/131163740/382a3027.pdf
- http://files.exsightcapital.com/uploads/1/3/1/4/131453214/5501348.pdf
- http://files.grapevinerealty.com/uploads/1/3/0/9/130969385/0fa37b4fa2.pdf
- https://cdn.shopify.com/s/files/1/0432/0568/9504/files/xelereganujax.pdf
- https://cdn.shopify.com/s/files/1/0430/8316/9943/files/93820075470.pdf
- https://cdn.shopify.com/s/files/1/0437/2873/2314/files/24428429682.pdf
- https://cdn.shopify.com/s/files/1/0438/5911/6182/files/punupedodiduvutigefo.pdf
- https://cdn.shopify.com/s/files/1/0437/3420/4568/files/24163509016.pdf
- https://cdn.shopify.com/s/files/1/0435/4929/4756/files/51353160255.pdf
- https://cdn.shopify.com/s/files/1/0429/1103/9655/files/zepob.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
- https://cdn.shopify.com/s/files/1/0438/4597/6224/files/56457891563.pdf
- https://cdn.shopify.com/s/files/1/0427/9471/3244/files/82991313084.pdf
- https://cdn.shopify.com/s/files/1/0437/7991/5937/files/23371258614.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_off000081f0.bin` `7cdbba9295bd25d883e04b7a166f8b40727366646c369c4a6a1d2e8a9f27ae68`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81F0	5032 bytes
`font_01_sfnt_off000092dd.bin` `7f7b48af5e4898a49c0c1e6297236d5831c091e7d5e725f4849f56b229f3d70b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92DD	10564 bytes

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